squirt, look on ebay for a good used 3stage msd retard box if you already have a msd box. i picked up and nearly new 1 last wk for 44bucks to my door, looks brand new.then you can retard for the starter and have a seperate retard for the nitrous, plus have 1 extra retard spot left over for a 2nd stage of nitrous then you could run full timing curve off the bottle, when you smash the button, the retard will pull out however many degrees you pilled it for. will help a starter live forever too!
That's kind of my point. I don't want a box. It's just another thing that can take a shit. My boat is a family cruiser and a ski boat. I try to keep it as simple as possible. If I feel the need for more juice, I'll get started on that spare block I've got on the stand in the garage. (stroker and replacement for this one when she goes).