> In 3ds max Add "Reset X form" to be at top of your modifier stack
Done
> If you use Panda exportee enable/check "left handed axis" checkbox before export.
Already having it checked
> Check that Bullet is using that system too. Check that Bullet "engine" creation properties doesn't set some "skin/penetration" offsets and what not.
How to do that?
BTW, I don't think there is anything here, since when I create a box shape, I don't get this problem.