Lots of gradients and stray light from somewhere coming in. Hard to process and as a result have lost the fainter outer arms.

Object IDM81 Bode’s galaxy
Mag. 6.94, Size 26.9′ x 14.1′
Ursa Major
Details2018-11-1 21:59 – 22:47 UT
Telescope250mm f4.8 Newtonian, MPCC
IDAS P2 LPR filter
CameraAtik 460EX, Baader LRGB  filters
Exposure(s)L 20x120s 1×1, RGB 10x60s 2×2 each
darks, flats were no good
ProcessingNebulosity 4, Photoshop