Several export variants also appeared, the Draken being exported to Danmark, Austria (J-35O) and Finland. 

The J-35J is a further improved J-35F having upgrades to systems, strengthened wing able to carry additional armament pylons and became available around 1985. It also could carry the AIM9 Sidewinder missile. About 66 planes were upgraded until eventually replaced by the Saab Jakt Viggen and Saab Gripen types. 

See also the references.. 

Hasegawa came with a very good kit and is the best Draken kit in this scale, with several kit variants being issued:
J-35O, kitno BP2 for Austria; (also in a box no.386 with "farewell special" decals with black livery; it lacks RWR antennas on the tail and around the exhaust, and IPMS Austria has a fuselage resin kit )
J-35F, kitno BP1 for Sweden; (also with a Red Livery as kit BP101).
J-35J, kitno BP3 being this kit of this Building Report. 
( Revell also boxed the later Hasegawa kit later on, make sure not to buy the old Revell offering ). 

For this model, the Saab Draken J-35J of kit BP3 was to be build.

This kit has 2 decal options:
(1) Division 3/F10 with conventional camo scheme and yellow swordfish marking (seen on box top)
(2) Air Defense Grey version of Division 2 / F10 unit with red/dayglow numbers

Notes on the J-35J kit (no. BP3):

• It has finely recessed panellines albeit no armament. This is really missing as you are left with empty pylons and only a couple of fuel tanks. 
• The dimensions are OK.
• Only the small pitot vtube on the top of the fin is missing.
• The J-35J has the port canon deleted (fairing provided in the kit as part C2)

I started with spraying some parts while still on their sprues, eg. various coats of white on the doors, gear legs and wheels. Also, some parts were sprayed metallic. After drying, moved on to assembly....

STEP 1
I decided to use an Aires Cockpit Upgrade resin set no. 7202. 
It has a nice seat and a nice cockpit tub with detailing. You also get etched metal parts for seat harness and instrument panel. 
This all replaced the kit's cockpit parts.

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STEP 2
I removed from the spine part A2 the bulkhead area as this is in the Aires tub integrally moulded. 

STEP 3
I added a simple bulkhead in the mid fuselage from card to prevent seeing through the fuselage. The fuselage interior was painted black.
Open the holes in the lower fuselage for the pylons as desired.

STEP 4
Assemble the afterburner section as shown. It needs some filler. 

From step 8, add the small fairing D4 below the aft fuselage.
From step 11, add the tiny port fairing part C2 (one side only!)

I also made very small notches open on the wing leading edge at the Delta root for the two small anti-collision lights.

STEP 9
Assemble fueltanks and the Sidewinder pylons are OK.

Now before adding detail parts, use limited amounts of putty/ filler. Especially on the nose fuselage sides and aft tail cone filler is needed. Sand and check for gaps. Add a coat of light grey primer.


COLOUR SCHEME 
Some general colour observations:
- cockpit interior : mid grey with medium green panels 
- grey seat with khaki seat cushion 

           early seat 73SE-F   and  late J-35J cockpit 
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- striped dark blue and green camouflage sports KFF 438 (about FS 35042) and KATF 325 (about FS 34086).
- sometimes also a pattern is seen with also Blue grey KFF 058 (about FS 36152) (about Humbrol 87).
- the overall later Air Defense scheme has two greys: upper FS36230 (Humbrol 128) and lower FS36495 (Humbrol 147). 
- the belly of fuselage and leading edges on outside wings and fin are often left natural metal.
- gear details, inside wells and doors: natural metal (including the unique small wheels below aft fuselage)

So, now apply first the desired paint scheme with an airbrush. 
I picked scheme 2 of the kit for an Air Defense Grey version of Division 2 / F10 unit of the Swedish Air Force with the attractive large red numbers. It flew with the type up to 1998. 

I used Gunze Sanyo 338 for the lower FS36495 and Humbrol 128 (or Gunze 307) for the upper FS 36320.

• The fuselage belly and metal leading edges were masked off and sprayed metal

• Also spray the pylons and gear doors but do not fit yet to the model 

• The intake lips were painted black.
• The small intakes on the airframe were given small black outlines and "gaps"to suggest these being open.

After the decals dried for 24 hours, I added some very limited wash in the recessed panellines. Usually I use the black wash from PROMODELLER

STEPs 5, 6, 7, 8, 10
Paint the small parts such as antenna's, the wheels, gearlegs and tyres as needed. 
Assemble as shown on the model.

STEP 11

• Carefully paint the canopy and add the nice tiny red edge decals. I added also the Aires mirror parts.
• Fit the windscreen on the model, this needs no filler at all.
• For the pitot tube I used a yellow piece of stretched sprue and added the black stripes with a marker pen (not using decal #44) .

FINISHING:

• On the undercarriage legs: add some tiny brake wires.
• Add a small pitot tube on the top fin leading edge. I used a piece of metal needle.

• a very small gunsight / HUD was cut from thin clear film and added on the top instrument coaming.
• paint the port anti-collision light red and starboard green light and fill notches with MicroScale Kristal Kleer

Now the model is ready! It looks very nice but I miss those typical Swedish missiles like the RB27....

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  note the two fueltanks below the belly and the Sidewinder pylons

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  [ click on pictures for a larger view ]

. the red numbers can be clearly seen here.

Check out the Draken successor, the Gripen here...

Books:
1. Saab Draken, World Air Power, Volume 17 / summer 1994
2. Saab Draken, IPMS Nederland, Modelbouw in Plastic, 1996 / 3  [Dutch]
3. Air power Int. no 14/Oktober 95: about Swedish Drakens.
4. Saab Draken, Bowidfeldt (1995), Air Historic Research
5. Aerofax Minigraph 12, Saab J35 Draken door Dorr, Miller en Francillon
6. Flygplansritningar 2 en 4 (1984), Bjorn Karlstrom. (drawings, Swedish text)
7. Scale Aircraft Modeling,  Vol 7/no 9/june 1985

Internet:
A. Saab Draken, IPMS Nederland, Webpages [ Scale drawings ]
B. http://www.scramble.nl/draken.htm
C. Saab Draken on You Tube video