How to choose the right protractor for my effective tonearm length


Hi, I have 2 turntables that I want to align correctly. TT-1 has an effective tonearm length of 223.5mm and 19mm overhang, and TT-2 has an effective tonearm length of 215mm and 15mm overhang. I currently have a Baerwald standard protractor that was made in Great Britain. It says the Vinyl source on it. And have a basic mirrored Stevenson protractor. Please I need help. Thanks! 
peterhaze476
Get Feickert, it was designed for ALL tonearms and all turntables and you can measure PS distance and choose one of 3 given alignment methods. So ONE protractor for all your turntables and tonearms/cartridges. 

You currently have 2 different and still don't know how to use them.  
I have a thin metal ruler, mm one edge, inches the other. 12" or 305mm.

I drilled a hole/notch one end, so it fits the spindle, starts at zero. just swing it around, pick a distance and location.

reminder: consider parked position clearances when dust cover is on when picking the location.

as for overhang, that ruler can be used for that as well, just swing it around the spindle.

the alignment discs are good for null points, overhang, and I use mine for anti-skate adjustments

https://www.ebay.com/itm/Turntable-Protractor-Alignment-Mat-Phonograph-LP-Phono-Cartridge-Stylus-A-N...

they make specif ones for specific arms, but this works for anything


Feickert is fine for your needs.  But so too are many other choices. By the way, the 223.5mm and 215mm parameters are the pivot to spindle distances recommended for your two tonearms, not their "effective length".  Effective length = pivot to spindle distance + overhang.
My favorite is the MoFi Geo Disc. Makes alignment so easy. The purpose by the way is to align the cartridge at one point in its arc. A longer arm reduces tracking error across the record but makes no difference in alignment at that one point.
I use DBP-10 for so many years and is excellent, does not cost much either. 
G