I think you would need a restrictor made of plastic or hard rubber to achieve what you're suggesting. I don't have an original Tron base, but I have a borrowed Astron Belt base that appears to be pretty much identical to the current Happ heavy duty sticks.
There are two square restrictors on this stick, a large one on top, and a much smaller one at the bottom. They are both made of some type of flexible plastic or hard rubber, and they have a cushioning effect. I'm assuming the Tron sticks were similar, except the restrictors were turned at a 45 degree angle. This would allow the stick to hit UDLR directions dead on, but you would still be able to force it into the corners enough to make contact.
Can either of you with Tron sticks verify this for me?
Bottom line though, I might be able to tackle this issue a little later on, but I've already spent a crapload of money just to get my prototype built, register a patent, and stock up on controls. Fabricating plastic or rubber parts is tricky and expensive, so I'm going to have to move forward with a less than authentic stick.
Besides, my cabs arent' even going to ship with tron on them, but they may ship with Battlezone. For that, a pair of 8-ways will do fine.