Has anybody used this OAG? I can get the M54 or M68 version of it for $108 with free shipping from a seemingly legit store on aliexpress right now. To this point I've been using an 80mm guide scope with flexure correction on my C8 and it's worked totally fine, but now that I have a 102 triplet I'd like to get an OAG for the C8 and use the 80mm on the 102. This is basically half the price of other OAGs I've seen so obviously is of interest. Link below, I know stuff like prism size matters a lot so I just don't know here, I've never really dove into off axis guiding before.
https://www.aliexpre...rch|query_from: