Excellent for DIY'ers, When I was experimenting around with Mel Bartels scope program I made a DSC using Dave EK's board and hacked an old ball mouse and made my own encoder wheels for it... Worked great, but the resolution wasn't all that good, most likely my rough way of making things... When testing i was good to see as you rotated the dial the numbers on the test program increase or decrease... I never got it onto a mount, but the idea was there, thanks for trip down memory lane... I think yours look way better than mine