@Guy: One thing I don’t think you have tested is how the reaction to an AV + Video source command is from the BL3500 when connected to the 1611 and MCL2AV? Does it just open the video source on the 1611?
Just tried that now (with no IR sensor on MCL2AV): BL3500 in Option 2 or 6: Behaves exactly as when selecting TV etc without AV first. Just opens the video source on the 1611. BL3500 in Option 1 or 5: You need to press AV first to open video source on the 1611. (Hence behaves just like most audiomasters in Opt 1) In both case above, if listening to video source, then pressing SHIFT RADO 6/7 or any audio source causes BL3500 to switch off.
Thanks for testing this. So the fifth audio input for the BL3500 is not an option. Might also have been overkill 😉