Two panels 15x6 min for each filter.
Full sensor res version 13MB
http://d1355990.i49.quadrahosting.co...8/CorA_M_N.jpg
PixInsight's Gradient Merge Mosaic does a very good job to eliminate seams with tricky objects like faint dust.
The second image is the best I could do with RegiStar.
Bert