which one is best, all-around trouble free, and where is best deal to be had-for tf not pg-thanks to all in advance

I have only seen one for the TF reverse pattern. Its made by shifnoid. I ran it for several seasons. No real issue with it. Pretty crude set up, but no other choice.

I had an air shifter set up in my TH400 now that was a slick piece. But consderably more money, and work plumbing than the shifnoid.