Just a thought -- it's been 25 years since I took the classes but you MIGHT end up with more stability if you only half filled the tubes, ie had all the weight low to the ground.

I can guarantee it would only cost half as much

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8