Sim lab Gt1 evo type rigs strength/rigidity

Hi

Looking to get a profile rig but need onee with small dimensions, so rigs like the gt1 evo.

The gt1 evo uprights are connected on top of the base profile as opposed to the side of the base profile, this reduces width and is great for me I know side mounting the uprights is preferable but I really need to know how flex free a gt1 evo type rig would be with a 15nm wheelbase.

I can't abide back/forth or side to side wobble I have seen reviews of rigs like the gt omega prime lite r where he says there is no discernible movement even using all his strength but what does that mean in reality.

I have a gt track at the moment and there is zero side to side flex as my deck is pretty low down and the up/down via pushing on the wheelbase is a few mm and it creaks a bit when I push on the wheel this really does my head in and is what I am looking to eliminate.

Are there any gt evo prime lite r users that can tell me what the strength of these type rigs are really like.