[jj777746]

I'm making a base for a small box and I'm having problems with the miter joints. I cut them on my table saw using an Incra V27 miter set to the 22.5 deg notch. I normally don't have trouble cutting 90 deg or 45 deg miters because I have tools to help me set the angles precisely. However, I don't have anything for setting up a 22.5 deg angle. I used a stop block when making the cuts and I verified afterwards that all like pieces are the same length.

For reference purposes, the cherry frame is roughly 4.5" x 8" and the frame pieces themselves are 1" wide. The stock is 0.5" thick.

My question is how would you recommend that these cuts be made? Would you use a table saw or a miter saw?
Do you sometimes get the same imprecise results and then fine tune the angles with a plane or sanding block? Thanks in advance for your help.

@chuckgray,I'm, fairly sure "Infinity Cutting Tools" have a 22.5 degree bit if that could help,or maybe not.Just sayin'