Robby, I've done some EAA DSO imaging. When I was active using the 224 M57 wasn't available for viewing but you can find settings on some of my images in this 224 album which can give you an idea of what to set. Most were shot using FireCapture, but today I probably would prefer SharpCap.
https://www.flickr.com/photos/23705399@N04/albums/72157656927157919
Don