There is light/Heavy
ITM
BR which i think is Bosch Rexroth range

the BR range only does up to 90x90 in 10mm slot by what i can see and the ITM range does 80x160 but only in 8mm slot

i am aiming for a really heavy strong bed frame using aluminium extrusion, should i get the heavy extrusions which are triple the price of the light version or do i get the heavy version. Also i need a high gantry for z axis height so i wanted to have the extrusions that the rails will be on high so if i got 80x80 in 10mm slot and the 80x160 in 8mm slot would that be ok?

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