V35 board...has latest Anti Jam software from Odessey..it has adjustable speed 17,24, 28,35, BPS (something like that)..accessable from the one button that switches it on/off as well...better on batterys as well I think.
There is also the "Angry" board, which I dont think is an Odessey one, that says it can sustain, higher feed rates than teh V35 board...but I dont know much about it.
I have a V35.
My mate (who you may have met when I was at Phills last, Dynasty Shocker) had a Z1 board, and it kept pulsing rather than straight feeding...which was causing chops in his Dynasty (after I rebuilt it, we decided it was the hopper!)...when I put V35 in his HALO, no problems.