Thanks, I'll give it a try.

I can't do any proper testing yet as I'm in the middle of a house move and everything is in storage, but hopefully can follow up in a couple of months.

Sources: 800D, Sooloos Control:15, Sony BDP-S790,Humax Freesat+
Control: 861v4, HD621
Front: DSP3100
Centre: DSP3100HC
Rear: DSP3100
Screen: Samsung UE50H6400
Projector: MF-10