3hrs of exposure for this nice edge-on galaxy.  It got cloudy towards the end of the run and there was a serious guiding error on the full 61×180 sec stack.  But, I managed to salvage the stack by copying the background and galaxy and pasting that in as a lightened blend on top of a 47×180 sec saved stack for the stars that did not have a guiding error.   Lucky I saved it before it got ruined.

Here is a closer crop with a saturation boost: