Plinko,
Glad that was helpful. Trying to measure/adjust the pivot point when you can't even see it is too tough for me!
Mario b,
IME Baerwald alignment cannot be attained with a Shelter cartridge on a Rega mounted at the standard 222mm. The stylus will not reach the null points. This is true of many cartridges, as explained on the instructions that come with most Rega/Baerwald protractors.
This is not a "flaw" of Baerwald protractors. It's a mathematical function that results from choosing a different alignment than the arm was designed for.
BTW, 60mm and 115mm are not the Baerwald-defined null points. You can use those points if you like, but you won't be following Baerwald's equations. The Baerwald null points are 66.0 and 120.9mm.
There is no reason to be nervous about changing your arm's mounting distance, especially on a table like Overhang's Gyro that's specifically designed for it. Deviating from Rega's specified 222mm to achieve a superior alignment has no down-side and no risk. Why would you be reluctant to do that?
One can certainly DIY one's own protractors of course, using any null point or null points one chooses. But a mirrored protractor like the TTB or Wally is more accurate for cantilever alignment than a piece of oak tag.