@lewm I am well aware of the source of the report, and that a direct communication was had with one member of a pairing that had been taking part in a project where the SP10 MkII was modified.
Firstly I spoke directly to the engineer who was instrumental in creating the changes. The information supplied in this manner does not qualify for being hear say, it has been a very fair assessment from an engineer.
I agree I am not directly in a position to receive a demonstration of the findings so will settle for the information supplied during the contact.
It was made known that one of the pair of individuals owns a SP10 R and at the time of the supply of the information was preferring the modified SP10 MkII as their daily used TT.
The measurements that have been taken has been analysed by a engineer friend I do have opportunities to meet, and there is enough to suggest that a further investigation is a worthwhile undertaking.
Hence, my comment that I am keen to take part in producing similar modifications.
I listen to the SP10 MkII and SP10 R regular and don't have a prejudice or preference for either, each is able to deliver a very impressive performance with a Sound Quality that is quite satisfying.
I assume these models are in a tight run race, and that at times the replays can between the two can become indistinguishable.
How separated these two models are to the 1200 Model range in their sound quality, is an unknown to myself, and I am not able to offer any comment.
If the OP can be supported in receiving a demonstration of a not owned Technics DD model, I am sure they would be very appreciative.