Cigarette Lighter Replacement

[67C10Step]

I am in a bit of a quandary on what to do with my cigarette lighter opening in my dash. The old lighter did not have the element or wiring, just a crusty old female section that I removed and tossed a few years ago.

After reading the thread on the dual USB charger install I ordered one and was all happy about installing it. Figured I would need a charger way before I'd ever need a lighter. Now that I am to the point of installing I am hesitating on opening the hole in my dash from about 24MM to 28mm for the USB. Other than two holes that once held a CB mike my dash is in great condition.

Am I overthinking this?