I just removed the belt drive to install a 11 driveshaft in my 13, and honestly it wasn't that hard to install the belt drive back on after wards.:
-place the lower gear on the spline first
-then slide the top one on the spline with the belt on it
-then slide the lower gear out to where its barely engaged on the spline
-then start the belt on the lower gear, once the belt is fully on
-slide both upper and lower gears together onto the splines until it fully seated.
Pretty simple and I didn't abuse the belt to get it on....