Can't wait to see that marquee installed and all lit up!
Spystyle used to have an awesome cab making tutorial available, but he sells it on ebay now.
Anyhoo, the reason I mention that is he used a technique for drilling with the CPO already installed that involves reverse drilling first so as not to tear the CPO. He was using a CPO printed on Avery sticker paper,
so I'm not sure if this applies to a vinyl overlay, but thought I would throw that out there in case someone can confirm that works on vinyl.