It's very stable, it weighs a hundred pounds. Which is why I built the platform with castors. A buddy here (FatLeadFoot) has an Obutto also. From a couple of years of constant use and moving it around his basement, he has to replace the carriage bolts. These are the 2 long bolts that join the 2 halves together. My point mentioning that is to highlight the mass of the rig.
The only movement comes from the guts of my G25 itself.
Wheel angle adjustment really isn't an issue. Sure I would like to have it. However, because of popular request, they are working on an add on to allow this adjustment. It can be used with current Ozones. Nice of them huh? If they can do this and maintain the solidity we have now, that would be great!
The PlaySeat's tilt needs to be VERY tight. Otherwise it will move at the worst times. Unless you are gentile with the wheel. Using the wheel to brace yourself when climbing in and out of the PlaySeat can loosen the tilt possibly damage the wheel.