Ok, I'm still struggling here.  When I set the send to 'xmt', the commands no longer pass through the unit to control the equipment further down the chain, but the tap tempo works (kind of).  When I set the send to 'thru', the other equipment starts receiving commands again, but the tap temp doesn't work.  What can I do to make this work?  Also, the tap tempo syncs up within a beat or so, but gradually drifts out of sync.  can someone please tell me what I'm doing wrong?