this is the area where i have a little headache. How do you fit a schrader valve into the end cap and make sure it wont pop out at high pressures. Must the hole you drill be the same diameter as your valve for a perfect fit

I fit a black circular rubber seal thingi, washer to the valve inside the endcap as an air seal, i fit it in place with epoxy and pvc cement. is this strong enough to hold the valve securely.
