Hay Cap21r,
Yes the 10 channel receiver is a -3 receiver. Your -1 receivers (8 channel and those with less channels) will work just fine with your 10 channel Tx, if you program for it. I am using a -3, 10 channel receiver with my 10G Tx, and using HD1501MG servo's with out any problems. It all depends on the make of servo or system your going to use with your -3, 10 channel Rx. Some may work and some may not work. So far all my Airtronics servo's seem to work ok with my -3 Rx. I'm using 94102 and 94322's with my -3 Rx's with out a problem. I've no idea how you set up your 10G Tx and I must also admit, I'm no expert with the 10G Tx...not even close. Call Airtronics and see if one of their experts can assist you in getting what you need.
Aloha and Merry Christmas,
Bob Paris