Originally Posted by Funwitagun69
Well, the 3rd hole is plugged by the valve set screw.
Which screw? The one you added when drilling the bottom tube just right under the bottom air port? Don't you need to seal this screw for airtightness? (In the case of a non-cartridge valve)
Anyway, I can't do it. Plus I really dislike the idea to screw my valve from outside: imagine I'd drill the hole just one hair aside where it should be... I couldn't screw my valve assembly tightly anymore with its backing nut.
But I'm a bit confused so if you have pics it would help me more than words.