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+1 for a moon filter. I had problems with a plastic bodied moon filter. The thread was a bit untidy and was a bugger to screw on to some eyepieces. Metal bodied was much better at threading. I have seen a video where the user just drops the filter on the eyecup side. Nice and quick but.......
However, I now use a variable polarizer filter which I think is great. You can adjust the brightness to suit the phase or just to suit your taste. It's quite interesting changing the brightness on a given FOV to see what pops out at you. Some say they reduce the sharpness but I can't see it myself.
I also like my oiii filter but I do have a 10" dob and I got the filter for a good price. The Tarantula neb looks spectacular!
Cheers
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