No, I definitely don't need any special tools to become the least popular guy at the party, I'm quite capable of doing that all by myself, thanks.
While I don't think that this tooool will indicate the quality of the mirror, is it actuality worthwhile for testing collimation and ep aberations,
I have been getting some really bad views of Mars and Saturn lately, just not achieving a sharp image. I'm hoping it's the seeing conditions.
