OP,
can you approximately measure center of spindle to center of arm post ____ mm
I’m a big fan of the MA 505 arms, (222mm s/post + 15mm overhang = 237 effective). It says designed for high compliance and also good for medium compliance.
I helped my friend buy, mount, calibrate a short and 505L long one for his Luxman PD444 2 arm TT.
Easy arm height adjustment, but, not so smooth I would do it on the fly like I can on my Acos Lustre GST-801, the easiest and smoothest height adjuster I have used.
I love the azimuth adjustable fitting on the end of the tonearm, that should be an industry standard.
Surprisingly, that tungsten wire is strong as hell, does not stretch, and the adjusters were very close to the digital scale,
I learned a lot about them, Vinylengine.com has all the manuals to download. See the variations how to mount them below the armboard.
check every detail:
Some have the supplemental counterweight.
Some have the heavy stabilizer nut below the armboard to fasten them, I prefer that to a simple lighter nut, my Acos Lustre has that also. If you find a nice arm without it, they occasionally pop up for sale separately.
Short arm: we discovered a problem on the small top armplate of the lifter, the screw was missing, seller had dropped a bit of glue and was careful with his photos so we didn’t know. VAS easily fixed it.
And, the arm height lever broke the 1st time we tried to tighten it, I suspect it might have been cracked, but hard to prove, easier to fix it. I found a socket head screw that fit the threads the proper length, BUT, the original part has a nylon tip on it’s end so it does not score the arm post. We put a small bit of plastic in the hole, the screw pushes it against the post.
Long arm, we had learned from the 1st one, we asked more up front questions, it was complete and perfect.
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btw, My rear arm, I had a 222mm hole, and the Acos needed 225mm. I was able to ease the hole wider, and the Acos bottom plate covered the slightly elongated hole.