Thanks for the review. I've been wondering about the Lyman unit. My bore scope only went down to .25 Cal. I needed something to do 20 and 22 cal. I picked up one of these NIB for $189.95 delivered.
http://testsite.uview.com/ProductDetail.php?PartNumber=580600 It's pretty good, but could be better. The lens isn't quite macro enough. I wouldn't pay full price for one, not for this application. Your Lyman has great resolution. Does that little monitor come with it?
I think you picked a winner!