Linear tracking tonearms.....

Hiho, that's true. You still have to take the head shell off to make an adjustment, because you can't get to the cartridge screws with it on the arm. That's allot more awkward, and will take much more time to dial in.

There is also the Bergmann Magne tonearm.

The ET2.5 or latest generation or Kuzma airline offer some of the best of the separate linear trackers that you can buy outright. I have only experience with the Maplenoll (ET2 are similar) arms and have been very pleased. I have not experience the cantilever deflection stated earlier but my custom design mods have significantly lowered the mass of the original arm, I ran a UNIverse for 5 years before i dropped it (argghh) with no ill effects. I have been highly interested in the Kuzma but just can't seeing dropping 5000 grand on an arm when i have one that really suits my table well. I really dont have experience with the high end pivot arms so i cannot make a fair comparison. But the Linear arms are easy to set up and consistently perform well for me

I agree, my Air Tangent is easy to set up and consistently performs well for me. I've never understood those who think they are hard to set up. I personally find pivoting arms much more of a challenge to set up and get them just right.

Ditto Trans-Fi Terminator. I have three pivot arms in the drawer(MS-505, EPA-100, Kenwood L07D), but given the steller performance and ease of set-up of Terminator, there is scant motivation to tinker.