Now, I'm biased about this as I gave up on the GSO scope that I owned - I just could not get it correct - and paid up for the CDK that I now own. 12.5" is a much scope as is useable in most locations. The 12.5 gets the same results (FWHM) as the 23" does 75 feet away from each other. When I read about these struggles with RC's I really wonder how much savings there is over just biting the bullet and getting a PlaneWave or AG Optical in the first place.
Apologies for hijacking - I just read this and feel so sorry for the OP. Still, maybe he's having fun with all this! YMMV as they say.
What's annoying is when a moderator hijacks a thread, offers no constructive help to the OP, only to tell us that he's biased because he couldn't hack it, implying that the product must be bad. Then the moderator says he's sorry for the OP, but then adds sarcastically, "maybe he's (OP) having fun with all this!"
Edited by Terry White, 30 June 2020 - 11:51 AM.