BORG 107FL F3.9 with NiteCrawler & New M57 R&P
One of BORG advantages are “modular” design, which mainly gives us more focuser options.
1- In addition to ESATTO 3″, you can build up the 107FL F3.9 system along with MoonLite’s NiteCrawler. This is a new setup of Trevor Tarnowski in Canada.

Looking perfect! thanks for feedback, Trevor. Enjoy imaging with a new scope.

Canon Fluorite in front.
This is BORG package for NiteCrawler.
2- Now Kasai M57 R&P focuser is available.
The good thing is this focuser allows to use BORG’s M57-threaded reducers. Probably it works with 55FL F3.6 too. Let me test and see. I understand many BORG users are seeking for M57-threaded R&P or Crayford. This is the solution for you.