Moin
I have the Fanatec CSL Elite LC mounted there and it is a bit wobbly.
Especially when you brake with the LoadCell, it tilts very slightly but that's absolutely fine and usable.
I am very happy with it!
The V3 will be very similar

For the V3s, it is recommended to have these things made via 3D printing (I had mine printed in DE): https://www.thingiverse.com/thing:4278...

thank me later :)