well i have done pull ups on this stand (only 3 mind you lol) and i found it very stable, the base plates are the trick here , they are aprox 60 cm long and actually weigh more than a piece of the truss as they are solid steel .

i think the stand will be more stable the more weight you add to it and it can hold over 200 kg .

everyone whom has seen it at the shop has been impress with the build quality of this item .