I think you mean .01. I have few options. I could rob a plastic spacer from the Carton I mentioned earlier and see if that helps, or stack 3 layers of some foil adhesive I have that's .003. Then after that try 2 layers, then down to one.
Yes the Mayflower is difinitely the nicer of the two. Obviously a better objective and a much better focuser. I usally don't have not much interest in Towas but it was a orphan OTA that I got for a good price and thought if it's any good maybe I'd use it as a guide scope.... or worse case, for parts.
The plastic ring spacer has a .10mm thickness not .01mm. Both the metal and plastic spacers provide an ample space and this is the reason why we don't see Newton rings with them. The ribbon trimming tape that I got from Pep Boys is .10mm with the backing paper removed and it's gray. It feels like a metal tape but I'm not sure it is. The adhesive has a light grip that's perfect for our purposes.
There are some good Towas around like the Sears 4454 80mm f/15. I have read that older 60mm Towas were of much better quality. They seem to have come downhill after the mid 60s. My first telescope was a 1965 60mm f/11 Towa. It's not great but ok.
Edited by oldmanastro, 28 July 2020 - 03:33 PM.