F.Y.I. APRA Rules Enforcement At Whittier
Mike,
I got the joke about filling in the mounting lugs. Even though Lefty was kidding about the mounting lugs, filling them with adhesive would probably not be considered a modification of the engine, since it would not result in affecting engine performance. But the airframe rules say "No cowling or streamlining of the engine is permitted", so that would probably preclude filling in the holes.
Ed,
>> The lugs are used as tooling points for the machining of the crankcase. Where else could it be held while all the boring takes place.