Thanks Daniel, its been a frustrating experience so far with trying to get the PMR belting track right on pulleys and not continuously jumping off.
I'm not overly enthused about the superglue joint that I did either, I think I may have overlapped it too much as there is a distinct 'thud' each time it goes round a pulley.
I've toyed with the idea of doing a butt join and using some soft braided fishing line (like Firewire etc) to join the belt like the old school method of joining leather belting.