With the high-end Futabas TXs you just reassign throttle trim to the analog slider next to the throttle lever and you get an analog throttle trim .. takes about 10 seconds to do. The analog throttle trim on the JRs really is a nice feature for jets .. but easy to emulate with the Futabas.

I used to use cross-trims on my 9Z but it got too confusing to remember which radios were set up with it and without it, and nightmare if you fly other people's stuff or they fly yours. Most of the jet guys at our club try to set up all the TXs as similarly as possible, even across brands, in case we share some flight time...

Dave