Originally Posted by Maelochs

Again a fundamental lack of understanding makes things seems clear.

I tuber has better strength that its weight and wall thickness would suggest because it uniformly transmits stresses. And a stress point and you weaken the tube fart beyond what the amount of material removed would suggest.

As has neen suggested above, Axially drilling that tube, or somehow precisely grinding the inner walls thinner, might safely and very very minimally reduce weight.

Might I point out that this guy weighs 220 lbs and is looking to remove as much as several grams from his bike to "improve performance."

What is Not wrong with this picture?