I've seen mine hit 50c, but it's fine. I've asked Walmis twice and he assured me its all good. Far from the limit and for our uses, shouldn't hit the limit.
the virpil base isn't especially strong so that stick is intended for maybe a fifth of that pull at most, depends on how much extra strength they built in but it very well might not be 5x
I don't want to shoot your dreams down since I'd like 20lbs myself, but I think there are quite a few potential issues to consider if you want to be successful