Some comments to you guys about the ST-R:
Shock Oil - 600 to 700wt in front & rear...I think 800wt is a bit much.
Diffs - 5 to 7,000 in front, 20 to 30,000 in center(20 for .21, 30 for .28 or bigger) and 3 to 5,000 in rear.
Ride height - Front bones level, Rear bones slightly above level.
Use Pavidas' shock and camber link positions, but I do like running the outside on the front arm/hub.
Comment on the notchy diffs: Some Conical(ring) gears may have clearance issuses with the height of the inside part (under where the larger diff gear rides). I have built 4 kits now, one for myself and 3 for customers and I have had problems with 3 of the 4. Options: Build it normal and run it in(1 to 3 tanks). However, change the oil, inspect the gears and rebuild. Should be good to go. Or . . . use 2 diff gaskets and follow previous comments...
I think the ST-R has great potential . . . we just had a trophy race here at out shop and I set TQ 2 of the 3 rounds with a 13 5:18 and 13 5:16 with my Hybrid Kyosho Truggy. I built the ST-R and raced it the next weekend (same layout exactly) and TQ'd with a 13 5:08....
End of story.