I want to share my lua script for trimming. It works as follows: https://www.dropbox.com/s/2ceuy2jj8hfftib/Surface_Trim.lua?dl=0 To a button assign the control "Lua Surface Trim" after you have copied the file into your FSUIPC folder. The Parameter entry consists of 100000 for Elevator trim 200000 for Aileron trim 300000 for Rudder trim To this add the amount you want to trim: 1 for very small trim a maximum of 16383 for full trim