Calvin has picked up an LC rolling chassis he will be using as a test horse, I believe he is on the lookout for an RZ too. I should explain why we've not already snatched your hand off with your kind offer Pete .... I believe Calvin favours the idea of working on bikes that he owns outright, no strings attached - rather than having to ask owners for permission to make modifications etc. ... and I concur. It's just a lot simpler when it's your own bike you are working on for development purposes. I can see how having someone else's bike could get complicated ... and if the arrangement is sort of open-ended, confusion could ensue.
Perhaps you could contact Calvin and talk about possibly selling one of your RZs to him?