Hi H, if "well begun is half done", then this is going to be an outstanding image
I started a similar mosaic last year with the 300 EDIF (2x3 farames, including a wider area of course) and ended up in missing some color subframes here and there so now don't have all pieces of the mosaic (in particular about colors) to complete the big frame. Postponed to 201x when the 300 ED will be back on the mount
I also started another mammouth mosaic this year of the same area with the TEC
. It ended out that several subframes were trailed because of the problem reported in my recent ngc6188 post. Luckly the OTA is ok now and mounted so I hope to collect some more light and at least complete half of the mosaic originally planned
I have also purchased Pixinsight recently and I am experimenting with it these days. I would be very interested in sharing your experience using this program, in particular about mosaics..
Clear Skies
Marco