I like Woodpecker products. One morning, 2 - 3 years ago, this was so cheap I had to buy it. It's not my fault.
I'm a sucker for the 'Pecker's stuff too and glad you didn't post this earlier or I'd be a few shekels poorer today.
I made this hack a few years ago with the 19mm MDF sides riding in both my mitre tracks. The tracks not being equidistant from the blade, I can rotate the jig 180° and I can use a fifferent kerfed blade for different sized splines, The 19mm MDF "bases" can be flipped (or replaced) to get more kerf configurations to avoid tear out... could also be used on the router table to make dovetail splines (sacrificial screw on bases). Made a couple of 22.5° wedges to accommodate my nightie flag box.
If your first cut is too short... Take the second cut from the longer end... LBD
