Great tutorial!
Only thing I'd add is that (on the 2-stroke People 50, at least), the new belt width is 18mm and the used belt service limit is 17mm, as per shop manual (well, elsewhere in the manual it says limit is 16.5mm). So, you can measure first, then know if belt replacement is necessary or optional.
Cheerios,
--garcia
"We're lost, but we're making good time."