Just a quick comment about the NFETS on an HK Sparky 2.
I have 3 originals but cant seem to get them any more so i went down the HK road and have found that the 2 nfets are only connected on 9 & 7 on the above diagram with the board that i bought from HK.
I was testing an inverter board that i made, works fine with the original but not with HK thats when i started to do a little digging.
So looks like i'll be making my own sparky 2's from now on. If any one is interested in using 7-10 ch on sparky 2 let me know.