Considering how faint this nebula is you have done a magnificant job here. Good resolution in the inner rim. It looks a tad out of focus but it could just be the noise associated with capturing this faint object. Great capture! Not many capture this amount of detail for 2 hours woth.
Thanks guys,
The focus issue could be a bit of blooming from processing too.
David, the frames are from a Canon EOS 20Da, ISO 800 mainly around 10 min shots
stacked in Depskystacker and mangled up with PS
frank