Jeff,

I made a high/low rate speed control that cost me about $4.  First I tested the servo and found that 5V was about the right voltage level for low rate travel.  I built a harness that goes in between the trim switch and the servo.  A smal toggle switch on the panel allows me to select full bus voltage for high rate or 5V off an in-line voltage regulator for low rate.  It has worked great for ten years now.  I can draw up a sketch if needed.

Chris

Chris Zavatson

N91CZ

L360std

www.N91CZ.com