Just thought of one more thing that might be relevant. When the aircraft is initialised, either when you control it, or as an AI aircraft, it quite often appears to be below the ground and then jumps in the air, and then settles back down. That may be relevant, it may not... it's just the only one I have that does that.
P.s. I would have emailed Michael myself, but I have been asking him a few things over the repaint and problems with his site... so I thought best not bother him again for a while.