Edit: lol, Tom Thiel replied while I was typing all this
@samzx12 Tom Thiel is hoping to eventually address the 2.7 but it is the very newest design and he has it as lower priority after older models such as 2.4 and 3.6.
If you read thru this thread you can see his intentions. The sandcast wirewound resistors are replaced with Mills MRA-12. I did this in May, a very worthwhile and cost effective upgrade. Most importantly, it mitigated a glassy quality in the midrange and with added ease of presentation. But I also heard some improvements in microdynamics, “fullness” of sound, soundstaging, and, maybe, a bit more bass impact. I highly recommend this to all Thiel owners.
Tom has decided on Clarity CSAs for most caps. Clarity CMR might be a possibility for cost-no-object CS7.2 and 3.7 when/if he addresses them. @holco used Janzen to good result in his 2.4s (check his comments in this thread or the one regarding CS2.4 upgrades). I currently have CSA in one channel, bypassed with 1% Multicap RTX. I also replaced all of my coils which were OEM from FST-China. These were poorly wound. New coils are ERSE or Janzen, including a couple of foil types, and are clearly of higher quality construction.
I haven’t done any serious comparisons yet as things are still burning in (just did this Sunday). That said, my initial impression is improved resolution and microdynamics. For example, I’ve been startled a couple of times at the clarity and focus of vocal inflections from background singers. My goal was to have a near-SOTA speaker from the midbass up, for a fraction the cost of new. I think I have a good chance of getting that.
