We are always looking for new ways to get an accurate tach reading from an engine. Has anyone ever mounted a hall effect sensor on the Cummins timing case to read off the injection pump gear? That's where Ford gets it's reading on the 6.9/7.3 engines. Seems like it would be relatively easy to install a bung in the timing case to read the pump gear. Shouldn't weaken the timing case if done correctly and should give accurate engine rpm. Any thoughts?