It just seems like putting it in the DP is much more of a hassle than you think. You're at the stage where you haven't modded much yet, but in my opinion, you'll want it as simple as possible once you have alot going on. Tuning the car with several gauges, pocketlogger and an SAFC isn't easy, and I really think that once you get to the point where you want to get, you'll look back and wish you had made it as simple as possible. Getting under the car for a simple probe check won't be something you'll want to do when you think it could just be right there in front of you. Having to watch knock, EGT's and 02's simultaneously will become more of a disaster when you have to add values to your EGT's. What if you're tuning and you take bunch of runs and don't get 1400 in the DP every time? At some point simplicity is the goal as well as speed. The DP just seems so much more complicated than it has to be for such a small item.

I can't think of many good specific analogies, but for the most part, the simpler the better. Down the road, I just think you'll kick yourself for making it such a hassle. That's what it comes down to more than anything. It obviously works, but why not get it completely accurate once.

Edit: Also, if the gauge is inaccurate after 1550, common sense says that once you reach 1550 and exceed it, it's close enough to danger areas that you'll wanna tune more. I know it's splitting hairs either way, but for all intents and purposes, it's accurate to 1600. it gets to 1550 and climbs more, there for its basically 1600 to an extent. with 02's, knock counts and other gauges it should be obvious if you're in tune at that point anyway. Also where did you read that the Autometer gauge is inaccurate after 1550? I haven't come across that before. If need be, I'll find another gauge that is accurate to a higher temp, if it proves to really be an issue with my Ultra-Lite.