Here's a crop [1:1] about 50% of the original wide-field. That was 15x5min with a QHY8 on a Celestron 5" autoguided with PHD on G11.
Stars are a bit soft due to collimation and a bit of coma. Center nebulosity came out alright. Next time I'll try to complement data with 10min exposures to get more of the outside blueish ring. Hope you like it.
http://www.multiweb.com.au/astro/M20_n.jpg