Interesting thread. I have a window shaker (8kBTU) with a reversing valve and heat strips (3kBTU), but a common fan motor. if I want to use strips on defrost I assume it'd be bad to cut the fan off
For defrost, I picked up an Emerson/WR single stage universal demand defrost controller, which I plan to hack in. it will cut out the fan if I let it (i'd probably cut off the back shaft to the outdoor coil and put in a separate fan/motor at that point).
Did you rig up your control board to cut the fan on defrost? or do you just let it spin?