Bruce,

I think you were intending to write a PIC book some time ago?

If you are still going to do it, I'd be pleased to provide some input, not because of any technical skills on my part but I started learning about PICs three years ago and the difficulties/mysteries are still fairly fresh in my mind.

Let me know if you want some input.

The 'two stepper' code is working very well and I've posted it on this site. The plotter scanner is great fun and the mechanics are pretty smooth - courtesy of cheap Chinese linear bearing that appeared on eBay a few month ago (About $10 each instead of $+++ for the 'proper' ones).

Regards Bill Legge