I have the LMA-2 RPM converter. I found an MPX5100DP pressure sensor I had laying around, and used a 7805 voltage regulator to power it (along with a couple decoupling caps). I entered two points in logworks according to the curve in the datasheet. I'd assume that's more accurate than the analog gauge, but at least they're close. I have rpm hooked up, but for some reason it's not being read correctly.