@raemin Great idea, thanks. I will experiment, just in case, since I have the board anyway (will update when I get it). For anybody else who wants to try this, the gyro is mounted with four tiny phillips screws from the back of the board. Once those are off, the gyro lifts off easily (there was a little hot glue on mine). A ribbon cable connects it to the board; to remove that cable pull up the dark gray flap, which is hinged, and the ribbon cable comes right out.
@yds Good info, thank you. Armed with that information I looked again at some of the omnibus listings that I've bought - sometimes the target is listed and sometimes it's not. Do you have a way of tracking down the target reliably?