hi bill,
nice captures! they are really vibrant, i like m27 way too low for me down here.
as for ngc 6164/65 you really need to use a an O3 filter to get the outer shell (as Rick has mentioned). you do show one part of the outershell/shockwave at 7/8 o'clock but in red.
but to demonstrate, here is two pics one without O3 filter being used and one with, on a modded dslr.
dslr with O3 (and Ha) and colour blended
https://www.flickr.com/photos/803366...blic/lightbox/
dslr with no O3 (or Ha)
https://www.flickr.com/photos/803366...blic/lightbox/
Cheers
Russ