I'm sorry if this has been hashed out already. I've done some searching and I can't find it... I'm curious if there is a source for longer v-slot pieces of extrusion. In the U.S., btw. PS Whoops. Called it V-rail in the title when I meant V-slot.
I'm interested in this too as I would like to eventually end up with 4' x 8' capability. Also, I would like to know some tolerances the stock is held to.
Typical tolerance, out of factory/extruder seems to be around +3.25mm/-0mm for cut lengths. Shipping of cut lengths longer than 1500mm could be a problem, mostly one of cost and proper handling by shippers.