Linear tracking turntables, whatever happened?

Great information.
I have always used and been a fan of the Mitchell clamp rather than a weight per se. Works on any spindle just about and I would have thought would not intrude in the path of any linear arm.
I would think some of the taller weights would not physically fit with the design of some linear arms.

Clamps - the TransiFi manifold beam rides about 35 mm above the platter and 47 mm from the centre of the spindle. In my setup. Therefore, any weight < 88mm (3.5") of any height would fit.

Cartridges - I use very low compliance cartridges (Mayajima Zero and Koetsu) with the TransFI, but prefer the sound with a 2.9g brass weight on the nose of the wand, and a ’German silver’ (i.e. nickel brass alloy) 0.625" disk, with two holes drilled and tapped to accept the #3-56 brass cartridge bolts. This increases the mass of the tonearm and the rigidity of the cartridge mount. Also, I use MoonGel on every flat surface (wand and saddle) to reduce vibration.

I’ll host a thread on mods and setup after my construction project is finished (summer?).

@whart 
Reply is above.

@ct0517 and @terry9 - thanks both re my cartridge compliance question. I'll do a little reading.
regards,
bill 

I have just acquired a Technics sl10 linear tracker which looks to be fully functional and in good shape.

My question is concerning the RCA out.
It looks like it has a built in phono amp as the little button next to the RCA outs says mm/mc.
Does this mean it cannot be used through a phono amp as there does not appear to be a bypass to this , just choice of mm or mc.
Thank you