Still a work in progress. APP is great for doing these sorts of mosaics.
5000 pixel size reduced to 2000 for this.

Object ID NGC2244/2237
Rosette Nebula
Details 6 sessions over Jan – March 2020
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX
Baader 7nm Ha filter
Exposure(s) Nominally 6 x 15 x 300s
but probably fewer since some will be discarded
Capture APT
Processing APP, Photoshop