Veil nebula, mosaic test

[lukepower]

Hi guys,

 

so somehow I want to get a mosaic done of the Veil nebula - working at 3500mm focal gets you in this sort of "trouble", right?

Anyway, here is a first try with two panels, just luminance, taken during different nights. Especially the left panel is made of just hree exposures, 10 minutes each (whereas the right is way more). 

 

Using Pixinsight, I was able to get them together quite well, just the background on one panel is lighter and thus slightly visible around the center of the image. Once I get enough data, the target would be to end up with a three-panel mosaic of that part of the Veil