Dear @rich121 : Good that you found outthe plint for your MK3 that you was looking for.
However I think that the FR64 is not a good match for the FR1 and Susurro cartridges due that the resonance frequency between the tonearm and cartridges is ar around 6hz-7hz that is below the " ideal " tonearm/cartridge resonance frequency: 8hz to 12hz and prefered if 10hz.
You own too a really good ( IMHO better than the FR ) tonearm in the Technics EPA 500:
" Technics has researched the problem of cartridge/tonearm matching and developed the worlds first ( and unique ) variable dynamic damping system, used in its EPA-100.
By matching the damping characteristics to the compliance and mass characteristics of the cartridge, Technics has succeeded in greatly lowering the low-frequency resonance peak of the cartridge/tonearm assembly. "
You can get the EPA 250 arm wand ( one alternative ):
" The EPA500 tonearm features interchangeable arm units, titanium nitride tapered pipe arm, dynamic damping system, Gimbal suspension arm base for various arm units.
The EPA-500 has further expanded on this concept so that you will now be able to obtain performance from your cartridge by selecting a tonearm wand with the most suitable effective mass, arm resonance and damping.
The EPA500 tonearm features interchangeable arm unit ".
I owned the MK2 turntable, EPA 100 and EPA 500 tonearms and owned too the Moerch 6 but never the 8 ( the 6 very unstable bad tonearm. Btw a copy-cat of the japanese Highphonic model. ).
In my opinion the more critical relationshipin the analog front end is between the cartridge and tonearm. Yes the TT is important too but not so critical like the tonearm/cartridge matching.
Regards and enjoy the MUSIC NOT DISTORTIONS.
R.