Hello Logenn,
Louis-thank you for your kind words and encouragement!
I am not sure where I am going to be able to locate another Lyra Olympos SL; however, comparing two of the same model FR cartridges will most likely be more realistically optimal. The FR-1 mk3, IMHO, will be a great fit for both the linear tracker and FR tonearms. Inherently the turntable drives and tonearms are of a different mix; therefore, as you appropriately mentioned, finding a common denominator at least with the cartridge will be helpful.
I do feel your similar emotions around the Micro Seiki turntables...they are just, simply, music making machines! Like yourself, I do find them to be a wonderful solution.
Best,
Alan