Mike Lavigne, I’ve always admired your system and your knowledge and experience. Thanks for contributing here. I’m assuming you are referring to the Durand (at least in part). I’ll look into that once againthanks.
my room was used for some early Durand tone arm testing, so i heard the various versions, and owned the Talea and then the Talea 2, which did allow for on the fly VTA adjustment. then he developed the Telos, which was higher performance with more mechanical solidity. and now the Tosca even better. neither has on-the-fly VTA adjustment.
i also owned a Triplaner which VTA could be adjusted on-the-fly, and a number of arms bettered it in my particular system. it certainly holds it’s own among choices in it’s price range, i still like it. but it’s not the last word for sure.
hard to pin-point one feature and connect it to why another arm surpasses it. but solidity in the base and bearing tower seems to be a significant factor in ultimate performance. what does it take to engineer in VTA on-the-fly and is it a compromise somewhere?
with the Rockport it was not. but now that would be a $300k-$500k turntable with that arm. it was hugely overbuilt. but that’s what it takes at the top of the food chain. i’m not an engineer, just an observer.
YMMV.