Goldmund Studio

The Pabst motor is a deal breaker. Besides rendering your TT a total loss if it quits, it's impossible to keep the speed accurately adjusted. The quartz-controlled JVC motor is repairable/replaceable and still one of the best DD motors out there (besides the Technics.)

Both the Studio and the Studietto need to be brought into the 21st century by removing the springs and replacing them with sorbothane pucks. The performance takes an astounding quantum leap, especially blacker background and more and tighter bass. To say nothing of improved ease of use!!

The mod is easy to make. Take off the top section (motor board, platter, arm) remove the springs, remove the big knurled height adnustment knobs, turn them over and put them back. Set a flat or domed sorbothane puck on top of each of the (now flat surface of) the knurled knobs, replace the top board, adjust to level as before, and you're in for a real treat!!

Unfortunately these tables came out just before the CD era, and their reputation was further contaminated by a flood of cheaply made DD TT's. Don't be fooled! I wouldn't be surprised if Goldmund brought them back in some new version now that vinyl, and especially DD TT's are making such a big comeback.;--) (I've had mine for 20 years BTW!)
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Satch, sorry, my TT is mounted the same as yours -- TT shelf into conc. block wall, on constrained layer damping platform.

I've assisted with three of these mods, mine, plus another Studietto here in town, and remotely, a Studio restoration in Australia. (I have also read very favorable reports from others who happened upon this upgrade quite on their own.)

Anyway, all three of us are amazed by the results! The springs truly suck, and I'm sure if M. Lurné had access to sorbothane he would have used it ;--) BTW, we use sorbothane of three different durometers (hardnesses) providing the same effect as the three different spring rates (K), and all three of out units are fitted with the Goldmund thread-on cones as specified.

So, not knowing exactly what you did, or didn't do, what materials you used, and how you measured/heard the results differently than we did, I really can't say why your attempt was so unsuccessful? I'd be happy to assist you if you like, however.