Here's one for Chris Dale:

The AMB instructions say the transponder should be mounted vertically (post up), with no metal or carbon fiber between the bottom and the ground. I'm assuming here that this is for those tracks that have a sensor loop embedded in the track. Where is our sensor located, if not in the track, and would it be better to have the transponder mounted flat, facing toward the sensor (antenna), like we orient our lap timer "eyes"?