I'm with Arnold E. Static + Pitot leaks mostly in VFR registered ****boxes. God damn I have spent days under dashes chasing leaks Eventually I came to the realisation that it's easier and less time consuming to change the whole static system in something like a Cessna 172.
I've found the static system open to atmosphere , Bolts stuck in the end on pipes and silastic up . Pipes completely missing, mud wasp nests ,chaffs and sun affected pipes etc.
VFR LAMEs have just been ticking boxes for a long time. Probably back to the days of when CAO 108.56 went extinct.
As for compasses most seem to have more air than fluid.
All over I think 100.5 has brought up the standard of aircraft. I get paid a wage either way and don't profit any extra from the additional work. My chiropractor might profit more as I'm breaking my back under a dash.