I have an old WM-150 and it was working but constantly auto-reversing. i opened the back up to see if the belt was a problem and the belt sprang off! I can't figure out how to route the belt back on! Can anyone give me a clue....

Well thanks to a "WM-101 disassembly (now WITH PHOTOS!)" post here on the forum I have figured it out! The WM-150 has very similar belt routing to the WM-101. Thanks Heiff!