I have just started experimenting with my TEC140 + AstroPhysics 2" 2X barlow. This is a link to a 10 x 5min sub combine of M83. My guiding was not perfect through the ONAG and recent days have been spent trying to improve PEC. I get some coma towards the edges but it won't be hard to crop out.
http://www.pbase.com/prejto/image/150070295/original
This image is only processed in CCDStack with mild deconvolution and DDP.
Peter