Here's a mistake you might like to read about?
A drilling accident happened today. I took the lower air inlet manifold off and then wen't around to the shed and proceeded to spot, punch and drill 8 holes to fit x4 LPG jets and x4 flash lube jets. I then placed a jet into a drill hole and it popped straight through! The drill was 6mm not 5mm. Don't batch render and do mechanics, it stays in your head!
I had to share it.