Late RRCs had them too, but it's offset differently.
I'm guessing the box sends a VSS signal once the gears have lined up. I don't know how proficient you are in electronics/microprocessors, but making your own 'ECU' for it in that case wouldn't be exactly rocket science - as long as the box isn't signalling the gear is in place, you keep rotating the motor.
Still pure speculation though, haven't had one to fiddle about with, although with all this talk about them it's tempting