Musichead,
Good discussion. What you heard as you tweaked VTF (balance of highs vs. lows, altered dynamics) is exactly what I've been advocating for years based on my experience with other top level LOMCs:
1. Take VTF down to the mistracking point (on real records).
2. Then nudge it back upwards in TINY increments whilst listening for exactly what you described. With practice, you'll eventually hear differences from changes of .01g or even less.
Of course this ideal VTF point will vary with break-in, with the weather and even from record to record. It's a moving target because the molecular characteristics of elastomers are unstable by nature. So I tweak our VTF daily, as do many on this forum, but I haven't had my scale out in weeks (the last time I changed cartridges). For daily listening I don't need to know a number. I just adjust by listening.
Question: why not trust your ears and listen at the VTF that sounds optimal, starting right now? You paid nearly $3K for a very fine cartridge. Why not enjoy its superb highs and dyanmics for every hour of its (limited) lifespan?
Doug
P.S. Excessive Antiskating has the same sonic effect as excessive VTF: dulled highs and smothered dynamics. Try setting A/S to zero before finding your optimal VTF. Once you've dialed VTF in really well, play some challenging tracks (real music, not test tracks) and listen for R channel mistracking (with your ears on the tweeter axis). If that occurs, nudge A/S upward until mistracking disappears or is even on both channels. Use too much and you'll hear the same sonic negatives as raising VTF. You'll probably end up using much less than most people think is needed.