No jigs - for the pointed tip I use a sliding table saw. Have never had success pushing moulding into a blade unless it is on a sled.
In this case I use a Peterman 14" Saw (Canadian), the entire table slides towards the blade and the moulding is clamped to an adjustable fence on the table. You could accomplish this by building a sled that rides in the mitre tracks on a standard table saw (like a Unisaw).
For the other miters I use a CTD M225 10" chop saw which is built like all their other machines only it is a single arm variable angle saw.
I took the pennant and used a piece of mat board the width of the desired border and used it to make a paper template of that the interior rabbet size would be. Measured each of the angles, bisected them and that was what I cut each leg to. I glued all three legs at the same time and used rubber bands on the pointed tip and filament tape (packaging tape with filament in it for strength) across the other two miters.
Frame was sanded down to 320 and then stained and waxed with Liberon applied with 0000 steel wool.
The setbacks are 3/16" gator wrapped with the same fabric as the float board. Pennant was attached through the "tassels" with Attach-EZ (inside the knots) and sewn through the letters with clear thread. It is a decorative piece - the client bought it on E-Bay and liked it because Woodward is her last name.