Very encouraging news! Thanks for the feedback. I've got an Accel 300+ ignition on the car and I've been very impressed with it and the Accel distributor, but I've been having a hellacious time sorting through spring combos, various vacuum cans, and the associated adjustments. Just when I think I've got the right curve, it stumbles in a new range, almost exclusively due to my combo's vacuum limitations. If this is as easy as you say to twist and tune, it'll be worth every penny! Now you've got me stoked. I'll be hawking the mailbox!