I did the middle wheelie last, you can get the belt around the outer wheelies very easily, then with two hands the belt slips onto the middle wheelie. Don't do any other wheelie last or you won't be able to clear the ridges, and at this point you're forcing the belt on pretty hard even with the adjustment screw all the way unscrewed. It will seem hard at first, but once you figure out how to maneuver your hands it's going to be super easy next time.

Tensioning the belt. I couldn't get the belt when strung to sound like the audio file on here. Maybe i'm just bad with pitch. What I used was the method of using the largest run of the belt. Using your fingers at the middle portion of the belt you try to twist it to 90 degrees. You want to get it so it stops twisting at 90 degrees. Past 90d and it's too loose. Under 90d and it's too tight. I hope this is a good method. This is my first time changind/tensioning a mechanical setup.

Went out for a drive and the screech is gone. Yay.