MIKE N. - Been many of Us here try to use TINY-TACH tachometers & hour meters with various degrees of success. One I put on my old 129 14-15 yrs ago worked great for a while, maybe a year or two then started registering only half engine RPM & hours. I've had a regular HOBBS style hour meter on my CC 72 since 1985 that has worked great and reads almost 1600 hours now. My Buddy had it follow him home from work, I think it's a Stewart-Warner brand, installed it a week or so after the rebuilt K241 was installed. I bought My 982 about 8-9 yrs ago with a new non-branded Northern Tool hour meter that works O-K also and rolled up about 260 hrs.
I'm not familiar with the Redington brand tach/hour meter. I've got a photo-electric tach I use to check governed RPM on my engines but I'd sure like to put a tach and some other gauges on the 72, namely cyl. head temp, oil temp, exh. gas temp, and a tach. I've looked at several brands and types, both analog & digital. Bad thing about cheap analog gauges is they don't last, custom quality gauges are brutally expensive, digital gauges are hard to read in bright sunlight, and they ALL take up much more room for installation than I have available on the 72.