@puppyt As we are sharing information based on the impact a New Addition TA has had, when used in conjunction with a Cart' that has a combined purchase cost of approx' $5.5K. I was correctly/incorrectly assuming the Set Up for the Geometry and chosen Tracking Force were already dealt with.
Additionally, It is a concern that after a couple of responses to your Update Post, there is information offered that has contributed to manifestation of a developing idea, that maybe your TA and Cart' choice are not correct, and a change is required.
Firstly, If you are not absolutely sure you have produced the best Geometry and Tracking Force, this can be done with immediacy and the most cheaply by using the eye to see if anything looks amiss. If absolute accuracy is wanted then the costs can increase to acquire the ancillaries to aid this task. Extreme Cautiousness is required, the fragile Cart's demands this, this end result of this as a method can easily become a very expensive activity if a unwanted mistake is made.
If a revisit to alignment is to happen, do remember there are individuals who prefer a Tweaked alignment, it lens itself more to their preferences. A tweaked to the VTA, are commonly done as the following tweaks:
'Heel Down' is sometimes selected for adding to the Sense of Weight/Dulling, where as Toe Down as a tweak is seen to add to the Steeliness/Brightness.
I have seen these produced to the extreme that the eye can easily detect the angle produced, but have no knowledge of how such a excess impacts on the Sonic produced.
As I am with a History of being very social as a participant in this Pass Time/ Hobby I have been fortunate to have built friendships, and this has lead on to the invites to Demo's of devices and loaning/being loaned devices.
I have been demo'd numerous Phon's produced as Valve Input/Output, Valve Hybrid and SS Designs, as well as having owned all three designs of which the Valve Types still remain in use. Included in these experiences has been the introduction to a large range of SUT's, I have experienced enough from these to have a good handle on what they bring to the party, and have adopted the use of Two Winding Designs for my own usage, and feel quite confident another Brands Model which has thoroughly impressed and is with a USP of using a nano-crystalline core, will be added to my system in the not too distant future.
As for Valves I have a friend who is a Second Generation Tube Collector with the inheritance of a family members extensive collection at hand. This individual has been extremely kind to the Local Hifi Group Members and has on occasions made available a broad range of Tubes from 70 Years to 40 Years Vintage as perfect matched pairs and quads to assist with Tube Rolling experiences on certain devices.
I am sure a Home Trial of a few SUT's can be achieved and maybe only incur a minimum cost if not wanted to be kept, the outlay will be well worth the experience gained.
As I sense you are interested in what a exchange of 6922's might create, the following might be useful if you look at Older Valve Models.
Note: A tested Brand New Matched Pair of Genalex Gold Lions had one Tube that the Valve Tester advised not to be used, even though it would produce a sound the measurements produced were a worry to the Valve Tester.
The Older Tubes can prove to be a more awkward experience, but if carefully approached has proven for me to have a very successful experience as the outcome.
Note: Putting a duffer Valve into a Circuit can be detrimental to the Circuit, it is best practice to do ones utmost to ensure the purchased item is fit for the role it is selected for.
I have arranged with Vendors that supplied Tubes are to undergo a re-test and depending on the outcome of my friends testing of supplied tubes, if the Tubes are a close match to the Vendors supplied test figures, the Tubes will be retained. If the Tubes measure quite different and for the worse, the Tubes are returned and purchase costs refunded. I have success with vendors who are agreeing to these conditions and have also honoured accepting the returns. I make these agreements outside of relying on Ebay Buyer Support.
Note: My experiences has been that 99% of the time, if a Vendor offers measurements, showing %age of life left in a Tube and more importantly if the NOT WANTED, 'Cathode Heater Leakage' is occurring, they are usually very accurate with their info, and a measurement on a different machine has reflected this accuracy.
Ebay is your friend on this one, as Buyers are allowed to return if not satisfied.