Thanks for the replies, actually didn't realise it was as complexed as that, I have a pectel board but currently just running SECS monitor and was looking for something a little extra and different to put in a road/track car, but think I'll have to weigh up the costs, as I'm happy with current management so no point in changing everything for a few extra nice to have features.

Don't shoot me, but I don't really see any major differences between Collins, Secs, and those other IAW aftermarket monitors. I am of course willing to be educated in this if I am misinformed.