nightcustard

Hi Steve - thanks for your comment.In comparison with modern electronics those Aiwa decks are a real rat's nest but it's good to hear there are easier ones to work on.There are a few websites where I found the belt dimensions but I've struggled to find them again - however, my Instructable has a link to where I got my belts from (a quick check today shows the belts are still available). The deck has been working fine since I fitted them. Incidentally, I found a website with the service manual and specs for the AD-F810 if you're interested - https://www.hifiengine.com/manual_library/aiwa/ad-... and here's a discussion about AD-F770 idler wheels - http://www.tapeheads.net/showthread.php?s=54c64ac7...Best of luck!Mike

You're welcome and thanks for the feedback. I hadn't considered the non-scratch 'feature' but I can see its merits!I guess if you were keen, you could make one with a small magnet in the base to keep the bit more securely in place but in this particular application of mine magnets are not a good thing...Cheers, Mike

I've started research into how to drive a 4" Bourdon gauge, application TBD - this looks a much more promising approach than ones I'd been considering (eg) direct drive of the spindle via a servo. Space will be the issue but your design definitely gives me food for thought. Thanks!

Oh I wish I had a 3D printer! Thanks for the link.

Thanks - I do feel a lot better about being underneath the thing since I added the restraint, although I always have to remember to duck!