@atmasphere I do like this description, it does somehow resonate with thoughts I have been having, as a result of having experiences of the use of a Tonearm and Platter Spindle Bearing that are modified and have the Tightest of Tolerances put in place for the machining, as well as other measures to create a friction free function.
Add this to a extremely speed stable TT, as a result of modification, it has brought me to the point where there perception is that something is present during the replay that is not usually detected, the overall replay has become a betterment to other experienced methods.
I am of the assumption at present the mechanical weakness now being incurred within the system is the Cartridge, as the assembly is not of a mechanical design to offer the best match to the TT>Tonearm.
I have attempted to resolve this by having a Ortofon Brand Cartridge rebuilt by a Technician using TOTR Ortofon Cartridge Internal Parts and produced to above factory spec' finish, by a Technician who has freelanced to Ortofon, and was instrumental in the development of the Windfeld PW.
With such tolerances engineered for the Tonearm and TT's function, and the attempt made to have a Bespoke Cartridge produced, that was 'hopefully once' a match in mechanical function. In relation to 'hopefully once', I am also of the assumption, as a result of wear and tear/collected contamination, the Cart' will be the first to yield its mechanical properties to the point of creating a lesser performance.
The centering of the hole formed in the LP to the groove centre, if not centred to within a specific dimension, will I assume, also be detectable as having an impact on the SQ being produced.
I do believe the TT's Platter Spindle Modification addresses a substantial proportion of a eccentric rotation, especially when considering the Platter Run Off is in the low microns when measured.
It would be nice to have all LP's play at a dimension of eccentric rotation inaccuracy of 0.1mm or less, but the time required to create this. Is in my view going to equate to a lot of faffing around. I will accept the avoidance of this as a 'vice, in relation to caring about all parameters required to extract every morsel of accurate modulation tracking during a Vinyl Replay.
As always the above is about equipment/tools that are required to have a mechanical/electrical function to enable a replay of recorded music.
It has nothing to do with enjoyment being experienced from a musical encounter. This is achievable though a variety of methods, of which one method or a selection of methods will prove successful.
Equipment is a tool and the more one learns about the merits of a particular design and the more that is known about the way a design has been produced, the more reassured one is that when using certain items for a LP replay, that there is thought gone into assembling the important ancillaries to be used. The knowing will be beneficial to the end user, offering confidence in their choices made, to enable the replay to be carried out with an accuracy put in place for the sound storage mediums replay requirement.