Take off cowls for inspection. Found small oil leak on oil coller fitting. Will have to replace 45 degree fitting with 90 degree fitting. Found LH tank "sucking in" while flying. The problem was a small piece of tank sealant that got stuck - blow out with air. In order to try and cure a left roll tendancy, a small piece of 1/4 inch brake line was taped to the LH side of the rubber - test flight muhc better. Re-align the RH gear fairing - ball now in center but left wing still slightly heavy. Foun fillet plates on spinner slightly touching the prop. Took both off and removed some material and re fitted. Found LH brake pedal on RH side bolts without cotter pins - fix. Found tail lamp working loos. Fised.