You could use an SWM. It is available from Solidsignal or weaknees. Also someone here on the forum can get them. They are expensive and you'd still want to use your existing multiswitch / get a cheap multiswitch for the H10-25. As long as you diplex only the HR10 after the multiswitch, you should get them in both places. IE diplex OTA to bedroom on one of the cables run in there. in the living room use one cable for SWM (2 tuners on one cable) and use the other cable for OTA to the AM21. Peace out.
Make Sense?
Make Sense?