Lewis, your Vixen flat-line guide graphs are stuff of legend. You should do a video like the iOptron slimy car salesman guy has - “you can’t make thus stuff up” (guiding from a 50mm objective, 162mm FL guide scope aka “toilet roll”!)
https://youtu.be/3ac2e_sTQVw
Ok, with that out of my system. I’ve really enjoyed extender-toa imaging on the TOA refractor. It’s F11 something, slow but very well corrected. You’ll find the same I’m sure. The only must - an OAG! You’re probably already using one right? Suggest no toilet roll guiding in an extender-type setup
