I just purchased a Bresser BR-N20839, however it came with a serial plate labeled as Explore Scientific PN210 (but that's besides the point). I bought this telescope strictly for astrophotography, I did lots of research and realized I will likely have to upgrade the focuser to hold my AP gear without slipping (OAG, Filter Wheel, ASI294MM Pro). I am using ASIAIR for my imaging, so I needed a focuser that supports the EAF. I settled on a JMI Event Horizon EVRZ-N. Upon installing last night, I noticed that the focuser holes will not line up on the optical tube, the holes on the tube are approximately 74mm apart, while the focuser is 70mm apart. See attached for a picture.
Are there any baseplates that I can buy to get this focuser to fit? If not can anyone recommend a focuser that will fit, and support an EAF?
Worst case scenario, am I able to drill holes to make it fit? This is definitely an option but I'm nervous drilling holes in a brand new Newtonian. Would I have to drill 4 new holes, or put 2 screws in, and drill 2 new holes (shifting the focuser 4mm)?