Ed; Say what you like I'm not getting into a ***-a-tat on something as trivial.

Fact: Some engine manufacturers have piss poor QA!

Fact: Some engines run better with a cleaner air/fuel mixture!

Fact: I said polish not grind (grinding your DQ'd), look in the crankshaft you'll see channeling ridges. If these were ground off I'd agree with you.

Fact: Atomized fuel burns better than raw fuel. No one made any comment ref: the spray bar.

Fact: I said I did it years ago! Manufacturers were sloppy and yes we set our own timing on Motors for F1 and in U-Control B/C/D Proto Speed engines, as well Rat Race engines.

As you said you don't open your motors. Today's technology is so much better in some ways. But you still have sloppy QA's in every manufacturing/production line.