Thanks Tim I'll give that a go, I finally pried it open and the valve pin was a bit weak so I put a few bands it on it and now it seems to be adequate. Although when testing the gun blew up in my face, turns out the sealant has deteriorated and worn away. It could have just been that, as well as the valve. Would epoxy be suitable or would anyone know anything better?
"They'll never soak me from this dist...."
-Everyone upon seeing the 2000