I have done this with a p200 and using the aux channel to engage "cruise control mode" effectively turns the left stick from "thrust" control to "speed' control ... the JetCat ECUs allow you to set a low and high speed value, and then proportionally the stick sets the speed in between. Its pretty awesome for scale routines

... I wish other bran ECUs also had this option. With all the turbines these days being reliable and many choices better than JetCat in some size categories( to me at least) this is the one feature which would still make me get a JetCat for some applications
Voy