So if you havent mounted it in the bottle cap like you said earlier,how would you be able to check if it was leaking??
I think your crazy dude,its like saying your sealing face on your piston cannon is leaking,so rather than change the sealing face you make a hole new piston..and besides it saves you all the effort of stripping a new shrader valve,but whatever floats your boat
as for the duct tape i recon thats a useless idea,duct tape stretches really easily.
you really need fibre tape to add the extra strenght,you can buy it for like 2-3 dollars,it looks exactly like duct tape except it has white string in a checker pattern running through it.
and really if you where to cover the bottle in tape how would you be able to see the stress marks on the bottle from continually filling it??
rather than just a nosebleed you might have a nice sensation of ringing in the ear when your bottle explodes