Looks like you are learning fast. In the adventure of making blanks depending on what you are using some times seconds make a big differance. I'll give you a little tip for capping your end while using PVC go to Home Depot and grab a rubber boot for a shelf and a hose clamp and use that to cap your end makes a stable base and multiple use instead of plastic wrap or what ever disposable capping system you might be using.
-Phil
