Has anyone had experience with the Schroeder Arm

Yeah, armboards, but plinths, too. Been reading quite a bit on the subject relative to suspended and non-suspended tables, visa via a plinth.

For an armboard, I was thinking of giving a wood veneer, brass, Corian, brass (or possibly an Isodamp-type material), wood veneer (opposite grain direction) sandwich a go.

The effective mass for frictionless suspended tonearm are different than friction tonearms (unipivot or gimball tonearm). The armtube for frictionless tonearm is much heavier so it can absorb stylus energy. This energy then dissipated by the string, silicone viscousity, or magnetic field. Medium and low compliance cartridges are better match for suspended tonearm like Well Tempered. If you can find how Mr. Well Tempered calculated effective mass then substitute magnetic flux for viscousity. It's basically a Bernoulli equation for energy conservation. The reason that string supported tonearm are more musical than ball bearing tonearm because string reasonates like guitar or violin string. We don't find many musical instruments made of ball bearings. At the Rocky Mountain Audio Quest, I tried to get Mr. Well Tempered to visit the Teres 360 and Shroder tonearm so he can kick himself for not including magnetic damping with his viscous damping tonearm patent. It took over 20 years for Frank to get a patent on it. Of course, magnetic is a little harder to see than liquid even though electrons flow like water.

Dear Nghiep: Truly educational post.
Regards and enjoy the music.
Raul.

Before taking Raul seriously see this http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1097129745&openflup&56&4#56
I think he is right.

Tbg- You and Psych are right! Romy el Gato lives!