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    Comments about the 235 as an IFR platform.. My 235/320 Lyc does very well with a S-Tec 50 system.  I installed it and it has not been without problems.  First, I have a series of resistors from 18000K to 43000K with a gang switch, located on the instrument panel, to select the proper pitch sensitivity which depends on speed, weight, altitude  and shoe size (kidding) The trick is to mimic the A/C's pitch control response with the 50's response to get a phugoid dampening once an control response is called for. The wiring from the controller to the Gang switch was an intermittant problem for a while since it came through the rear of the controller seperate from the 50 pin connector and would short out the unit at inappropiate times, several trips to Mineral Wells over a years time finally got it.
    Roll control is no real problem, except keep as little "slop" in your alerion pushrods/rod end bearings as possible. I installed the servo in the left wing and attached it's push rod to the 90 Degree Bellcrank.
    Altitude contoll is really amazing it holds an altitude right on, not even a 5 ft deviation, once the right resistivity has been selected.
    The S-Tec DG with heading bug, an electric turn coordinator, and a controller wing leveler function completes the system..
    On long flights, it relieves the fatigue factor a bunch... It's been a good unit for 9 years and 500 hrs. Don Skeele N320J (503)769-2563

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