I've been building a shop for bout two years now, and I've just started messing around with RBSs. I think I've come up with a fairly easy way to position the rails and "C"s for the RBS track. I'm not sure if anyone else is doing it quite like this... (If so, sorry, I must have missed the message.)
Any ways, the main idea is to use a bucket of sand to position the pieces roughly where you want the, and then to use rare-earth magnets to hold the rails at the right distance, and then one more magnet at the end of a rod to hold the "C" pieces in place. It's getting late, and I know this isn't too clear of a description, but there is more on my web site, at:
Once the pieces and rails are in position I've been MIG welding them together, but my welds are pretty messy and it takes along time to clean them up. I'm going to try tacking them in place with a MIG welder, and then finishing it with O/A. That way I won't kill the magnets with too much heat, and I'll still have nice strong welds that don't take too long to clean up. I'll try messing with the settings on the MIG welder, too I've been having trouble getting a good strong weld without putting down too heavy a weld or just blasting through the 1/8" rod. Any suggestions?
I'd love to hear some comments, especially if someone has an easier way to make these!