Thanks for the reasurance Hood!
As far as the rapids go, its not an industrial machine anymore, and its not like its costing me the same £40/hr as the machines at work do. What I want is accuracy, and longevity, so oversized and reduced down is good for me, as it means they'll not be working hard all the time, and are hopefully going to last longer.
Anyway, I might try and see if MCP will do an offer on 8.5's instead...
In answer to the original question to get back on track, I've been having email discussions with Gary Higgins of Zapp about MPG's. He's been really helpful, and has tipped me off about a rather nice looking pendant designed for Mach3 which will be going on the new website hopefully during the next month. I think I'll give them a try!