Hi, Im building a LARGE foam cutter for my business. Due to the lenght of the axis, 9 feet, I was considering going with some of the cogged timing belt and pulleys. With a foamcutter there really is no load other than the weight of the machine. But I also plan to build a device that will turn the whole thing into an 8 x 8 router table. I guess my question is what sort of stretch can i expect from a decent grade of that type belt. Im thinking .75 wide belt with the kevlar strands. Ill most likely fasten the belt at both ends and have the motor travel with the axis to shorten the length of the belt. Any input anyone ?