Gordon,
I hear ya and remember that thread well! This was not a servo lockup but a gyro lockup. Here is what I have installed:

JR460T Gyro
JR8411's on rudders
5 cell 1800mah receiver pack
MH 5.2volt regulator

I am running about 40% gain gear down and 0% gear up. The gyro went full left deflection with the gear in the UP position?? I did have some concerns about this gyro since I would have to sub-trim the rudders every day I went out, depending on the temperature the rudders were always out of trim either to the left or right. Once trimmed for the day all was fine. I was performing some low speed vertical snaps just before the gyro went south, once the rudders went full deflection the plane snapped on me several times in level flight. I fought the snaps trying to get myself lined up to land. I then dropped the gear and the rudders centered and allowed me to land. With the gear up the gyro deflects full left, gear down it is fine. Last time I will be using a JR Gyro :-(....
Todd