Why can't the LOD holding an LPDA and a walkie listen/feel for flexible fulfillment alerts and call a BR TM when one comes in. This way the BR TM can use a PDA that actually works well for pulls and back stocking. This would also keep the LOD aware of what the work load is of the BR TM.
Seem that more and more is being placed on TMs
This is what the LODs do in my store. The LOD signs in and when they get an alert they call the backroom. It works pretty good and is actually one of the things my store does right
Ours usually do this as well.