I am trying to avoid the stick-on emitters because they are visually rather intrusive. With an AV stack of 4 boxes there would be a lot of wires that would tend to spoil the appearance of the kit. There would also be far more (and much longer) wires routed back to the IR receiver than required for my preferred solution.

In addition, I don't see why retransmitting the IR codes via 'flooder' emitters should be any different from using the original remotes. To the best of my knowledge, all the codes are unique and therefore no 'interference' should ever occur.