Fuel pressure guage

How many of you guys run a cowl or hood mounted mechanical fuel pressure guage? Currently all i run is a small guage on the carb inlet line and want to switch to a cowl mounted guage. The problem is that i really dont want to drill holes in the cowl or try and mount the guage to the hood, or the vent on the cowl. So, my question is, how good are the electric guages with the sender that can be mounted inside the driver compartment? are they worth it? they are pricey! accurate? i already purchased an Auto Meter mechanical, but may send it back and go with an electric.