Thanks guys, I have timers for my freeflight model airplanes. Also a logbook makes sense to keep different engines and burn rates noted....I have been told as I get older, memory is the Second thing to go.....I can not seem to recall what the first thing was 
I know that probably seems a bit anal, but it just works well for me to make notes etc it doesn't take long to do and I actually enjoy it and its interesting to look back and see how many hours you've put on an engine since you've owned it.
Coming from the man that Needs to install the "West Wing Expansion" on his steam room....a logbook makes PERFECT sense to me!