flo scan....

[charlie_the_tuna]

i'd like to install a flo scan to monitor just how bad this thing is on gas. i know they can be a bit pricey, but what's it like installing one? is it a big job? i'm sure i could do it but is it worth the effort/expense?
maybe it could help me find an economic cruising speed. more than likely not. i've been cruising up around 4,500 rpm. much lower and i come off plane.