The oil pressure one was the easiest to install, just remove what's there down by the filter and install an adapter. Then run the wire up to the gauge.
I guess I was thinking the difficulty is keeping the idiot light functional as well, because it seemed people were having to rig a bit of a contraption to make both work.
Hey Gryph, I didn't set mine up to use both the light and gauge, but it's easy to do. An adapter is needed due to metric threads on the bike and SAE on the sensor from Autometer. Some riders install a "T" and continue to use both, but space it limited down there so I didn't.
PS: Spring is just around the corner, we just haven't reached that corner yet.
