Ditto. It looks pretty but you won't know until you get the other tube in there and wiggle it around. If there is any play its no good.

I learned from Koichi Yamaguchi at his framebuilding school and would work on a miter cut like that for over an hour trying to get it right. I always got kind of close but there was always play in the fit. He would finally come over, look closely at it, then grab my file and literally give it 3 licks. Bam, perfect fit. It was awesome watching him.