I personal have never seen a 7.5 degree bit but if you could find one that would be a very accurate way to get the right angle. I should also point out I never looked for one so maybe a lot of people sell them?????
I'm not sure about what you mean by a wedge? You can make a slide that holds the wood at the correct angle if that is what you mean.
I have also seen what are called multi-sided glue joint bits that allow you to do 16 sides (67 1/2 / 67 1/2 degree) (looks like a birds mouth cut). Check Eagle-america for them, or? Maybe they even have a 24 side version??
I would guess you already know how critical the angle and widths are going to be to get this round.... Sounds like a fun project. I would like to see pictures when your done and even along the way....
Ed
I'm not sure about what you mean by a wedge? You can make a slide that holds the wood at the correct angle if that is what you mean.
I have also seen what are called multi-sided glue joint bits that allow you to do 16 sides (67 1/2 / 67 1/2 degree) (looks like a birds mouth cut). Check Eagle-america for them, or? Maybe they even have a 24 side version??
I would guess you already know how critical the angle and widths are going to be to get this round.... Sounds like a fun project. I would like to see pictures when your done and even along the way....
Ed