Mitre templates for hooded dropouts - possible workaround?

Was wondering if anyone has had any success generating mitre templates for the junction between a chainstay or seatstay tube and a hooded dropout?

This is a 'nice to have', but I'm mitring these joints by hand and feel that templates for these junctions would defintely speed things up. Will post this in feature requests as well.

Thanks in advance,

Rob