I'm definitely going to look into it, but I'm still going to upgrade to the programmable box. I did an experiment on the distributor when I was locking out the vacuum advance. I already have a 3stage retard that I use to pull timing for when the nitrous is active. I locked out the distributor and tried to use the 3stage basically the same as I would with the programmable box. I set 36* advance locked and set the retard with pills. I was only able to take out 7* with the pills that I had, so the initial timing was way too high at 29*. I backed off the distributor to drop it to 18*, but now I didn't have enough total advance, but I did notice that the timing was rock solid. My timing mark, jumps around a little with mechanical advance, but solid when it's locked. I figure that a locked distributor will have the same effect with the programmable box, but I will have a proper advance range.