Very nice looking! I guess I don't understand the relief formula, will have to study that some more.
PD - if you scroll cut a shape (circle, square, letter, number, etc.) the kerf from the saw leaves a gap between the inside and outside pieces of wood. If the cut were vertical, the inside would fall straight through the outside. If you angle the cut then the inside piece can fall a little before it hits the outside piece. The amount it falls is what I called the relief. If you know the kerf (Mike's workshop lists blade thickness - about the same as the kerf in a straight cut) and the relief (how far you want the inside piece to drop) then you can calculate the angle to set the blade to for the cut. sin(angle) = kerf/relief, so angle = inverse sin(kerf/relief). You can get the inverse sin function on the Windows calculator (Start/All Programs/Accessories/Calculator and set View to Scientific, then click on Degrees).
For a 6 degree angle, sin(6) = 0.105 = kerf/relief. From Mike's site, a #12 has a thickness of 0.020", So relief = 0.020/0.105 = 0.191".
If you know the relief you want to get and need to calculate the angle, then angle = inverse sin(kerf/relief). If you use a #12 (kerf=0.020") and want a relief of 1/8" (or 0.125") then the angle = inverse sin(0.020/0.125) = inverse sin(0.160) = 9.2 degrees.
The steeper the angle, the less the relief. The less angle, the greater the relief (until the inside part falls through the outside).
