Good post and something I never think of. I just got one of my planes back in the air after hanging on the wall for a couple of years. I was having problems with getting the fuel out of the plane at the end of the day and the engine wasn't running quite right. I pulled the tank and when I pressure tested it the bung blew out. I too soak my tank and fire wall with epoxy so no real problems yet, time may change that. After reading this post it got the gray cells working and I will be hanging that plane by the LG from now on!! Thanks for the reminder, it was something I never gave any thought to. I have wondered about all that oil going into my front bearing though. Not a big deal if you fly the plane often but time would allow the castor to harden.