Question about the GT Wormhole

So I have been looking at the GT kens with their wormhole hole on each ken.
What I was wondering is; is it possible to just take any normal ken and take a very small drip bit and drill your own wormhole in it? It would be extremely easy to do. Or would that ruin the ken?
Thanks!

Yup.

http://puu.sh/949m7.JPG

Nice! What size drill bit did you use if you remember.

Could someone please make a tutorial on how to drill a wormhole.

Its really straightforward, you just drill a hole through the side of the cups at an angle.

I guess I’m not creative enough or good enough just yet, but what exactly does the wormhole do for you? I suppose it opens up more trick possibilities, but like what? Any videos?