Great shots there, yes the MPCC is great, they work great on all SN's as well as standard newtonians. They may possibly correct coma on some refractors too, I guess that remains to be tested. If you can get a guidescope going and can guide for 5 to 10 mins at a time, then I thouroughly recommend either a 2 inch Lumicon Deep Sky, or Baader UHCS filter. Using such filters along with the MPCC and shooting 10 mins @ISO 1600 will blow you away with how much nebulae can be recorded, it seems to suck the nebulosity from the background, making up for the lost Ha sensitivity, and at the same time, the images will have a bluish cast, neutralising that further brings out the reds., examples, taken with my Unmodified 300D and 10 inch F5.6telescope (no MPCC at the time)
http://www.users.on.net/~josiah/temp...64-65small.jpg unfiltered
http://www.users.on.net/~josiah/baad...teredsmall.jpg filtered
http://www.users.on.net/~josiah/temp/lagoon%20final.jpg unfiltered
http://www.users.on.net/~josiah/baad..._filtered2.jpg filtered
The nebula filter makes a HUGE difference.
Scott