Drillium - Drilling bike frames and parts

I imagine that this work will take you at least a few hours(assuming you're going to do it in a workshop so you don't make a mess and ruin your parts), I don't know how much your time is worth but a few more hours spent at work = higher spec/lighter parts and a reduced chance of bone death.

Where's the fun in just buying lighter parts? Capitalist slave! ;P

Maybe. So that is 20g from a chainring. What other parts are safe to drill? (assuming a chainring is)
If you save 100g from drilling parts do you really think you would notice it?
I can safely say that when I have changed a part for a part that is 100g lighter there is no way I have noticed, hence futile.

Well, if you can reduce the weight of the majority of the parts by 10% give or take on a 9 kilo bike you reduced it by almost a kilo, seems pretty decent to me.

And the topic of reducing weight, here's another thought, what about a bit of drilling (not too much) and a bit of sanding. I think I remember a certain professional sanding down the majority of his parts to reduce the weight, but I can't remember who...

Surly reducing the width of a chainring will save quite some weight, while not doing too much structural damage, right?
And if you round off all the edges/corners, that would save a fair amount, I expect it is unlikely that the edges provide significant structural strength to the chainring. Also, I am using a chainring as an example, the techniques could i expect be used for the majority of parts.