I am having some issues with extremely poor image quality with my 8" Edge HD, which typically has a reducer and moonlite focuser attached to my QHY camera and accessories. So I'm trying to isolate the culprit. My collimation is dead-on as measured by metaguide so I'm looking at simplifying my imaging train one-by-one to see if I can find what improves the quality. I am trying to attach 68mm male-ended extension tubes to the SCT which has a 2"-24 rear plate on it. Does anyone know of a 2"-24 to 68mm female-to-female adapter? I found a female-to-male here: https://agenaastro.c...apter-c-08.html but no female-to-female. Also, this adapter only has 6.5mm female end on the SCT whereas the male threads are 10mm on the Edge...I'd prefer those to be closer. Should I just buy that adapter then also get a female-to-female gender changer like this one https://agenaastro.c...ng-2458195.html ?