These circumstances are a bit different but there is a similar ganging of two IR outputs to a single emitter when you used a six zone Elan Z630 which worked well. The Elan piece has changed and it is done differently now but it worked reliably for two outputs to 1 emitter. Will it work with 3 and disimilar equipment? Thats why we should charge the big bucks. So we can do the custom thing and find out.