Good job Jarrod, nice to see a DSLR/lens/Polarie shot that isn't a Milky Way widefield!

There will be lots of comets within your reach. I've gone up to 3 mins at 200mm zoom with a Polarie so a minute shouldn't be any problem. Do you have the little 'telescope' accessory for accurate alignment?
Don't worry about filters - DSLRs pick up the nice green if it's a 'gassy' comet. People who do astrometry on comets often use R-band filters which pick up the dust reflections but miss out on the Swan band emissions which give the nice green extended comae. Visually, 'comet filters' provide greater contrast at the eyepiece to see faint gassy comae but photographically you might as well take all the light you can get. Keep up the good work!
Cheers -