Good to hear that you had such a good experience with your new scope. I'll second Alexander's comment about aperture and resolution. Moon filters are quite cheap and if one's not enough, you can piggy back them. If you do want to use a mask, from my miniscule understanding of the optics of resolution, you'd best go for a central obstruction rather than an annular one as your resolution comes from the width of you collecting surface.
Wait 'til you get to look at the moon when it's got a terminator - then you will really appreciate your bigger scope.
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