Ha ha!
I tried to do 6357 last night also, with my QHY8 that arrived Thursday from Gama. Great service and expedient delivery!
I have had all the trouble in the world doing the flats until I contacted a more experienced imager. I had an ok colour to the nebula, but I had red rings around the edges of my image. I too thought that the transition from DSLR to QHY8 was gonna be easy,
WRONG
! What software are you using to capture & stack your files?