Technics SL1000 MK3 (SP10 MK3) performance/value VS modern turntables?

Dover, Stop.  Why don't you and Richard just have a duel at sunrise.  Water pistols to be the preferred weapon of choice.  As soon as his name is mentioned, out come your familiar attacks.  New Zealand is a beautiful and wide open country, and I am sure there is room for you both.

JP Jones at Fidelis is very familiar with all the various servo systems used by the various modern and vintage DD turntables, and I am sure he would have a lot to say in rebuttal of your issues with the Mk3.  The MN6042 is the primary controller for the motor (not just one of several such parts), and JP's replacement module made from modern SMD parts is a bit superior to the MN6042 in doing that job, but not all that much.  In my opinion, what you are hearing from the Mk3 that you find objectionable has nothing to do with the servo, unless you have been listening to a subpar unit and assuming in fact that you have ever had an extensive listening experience with a Mk3 in your own system.  Do not assume that the Mk3 is just a bigger stronger Mk2.  It's a whole different and more colorless world.  I can say that having owned both and having had them side by side in the same system. 

Lewm - just to be clear

I use to listen to an SP10mk3 just about every night for about 3-4 years back in the early 80's - purchased NZ new, Technics EPA100mk2, and various cartridges bog standard and immaculately maintained by a precision engineer, fully qualified, who owned the largest die cutting machine in Australasia.
Over the last 40 years I've heard it in multiple systems with different arms along with multiple L07D's and many Sp10mk2's which are more common.
The last SP10mk3 I have listened to at length was fully updated with Krebs mods, Porter plinth, SME V12 & Ikeda 407 mounted.

With regard to the servo system I cant understand why you cannot conceptualise that advances in motor controller technology might improve the SP10mk3 significantly. Are you still using the computer you purchased in 1978, if indeed you had one.

As far as vintage audio goes, rare items are now like vintage cars - if you modifiy them chances are you diminish the value. Do you not think that folk who are interested in modding their equipment should be fully informed when making their decision. All I did was point to the website of the modifier, I did not make any subjective statements on the quality of the work or efficacy.
The modifier in question on his website states that the mods are not reversible, and if any breakages occur in the modification process, the modifier eschews any legal responsibility due to the age of the equipment.

I have very low mileage MK3. JP fully serviced. New chip. No Krebs! FR66s arm. Couldn't be more happy and would def concur with the term "endgame". Don't sell it!

Just to clarify...the $2500 I posted earlier is approximately $1300 for electronics/controller chip restore/upgrades and $1200 for Krebs, which I may wait on the Krebs for now.

Sp10mk3 in good nick with restored FR64S is a great thing. Btw how much was the cost for the FR64S service and rewire at Ikeda?