Nissan used an unusual 360 degree slot and purpose built hardware in their cam angle sensors. There's code in the works for the MS3 to support this, but for the MS2 and many other standalones, we concluded it was easier to replace the trigger wheel int he stock CAS. Well, we just had a batch of trigger wheels made up for many of their four cylinders:
http://www.diyautotune.com/catalog/nissan-optical-trigger-wheel-for-sr20det-or-ka24de-p-472.html
This one makes it easier to MegaSquirt an SR20DET, or go coil on plug on a KA24E or KA24DE. It fits the following models, and possibly others:
GA16DE
KA24E
KA24DE
SR20DE
SR20DET