Quote Originally Posted by snock View Post
Personally I wouldn't go cocking around with drilling holes in pressure vessels. It ain't worth the risk.

What's so hard on removing the buddy bottle anyway. I've never had any drama doing it.
Bobs parts do not have you drilling holes in buddy bottles, they fit instead of the bottle valve so the bottle stays put all the time...the kit adds a gauge and quick fill

Here is a link with a good pic of the parts....http://www.amazon.co.uk/ORIGINAL-DR-.../dp/B00NP6SJFY