Hi JA,
Interesting idea..
I think now I have a teleconverter (the type you are mentioning) somewhere in my lens graveyard... so I will try with it - but not before I sort out the OTA mounting issues, which may take some time.
I also have couple of telescope objective air spaced doublets ~ø50mm (they were available from ebay for couple of bucks some time ago)..
As for 10 hands... 3D printer will help
