Telecaster Jack Cup Hole

So, I'm in the process of putting together the guitar I'm building from a Grizzly kit. One of the upgrades I'm putting on is a Glendale Guitars Machined Jack cup (the blem versions are $10 off). I did a test fit last night, and it seems that the jack cup hole in the body is just slightly too small to fit the Glendale Jack Cup. I'm guessing the hole is a little smaller on the Grizzly kits. It looks like I'm going to have to drill it out.

So, my question is, what size is the jack cup hole normally?

I believe (without looking it up) that 7/8" in the norm for side jack holes. I think that is for both Tele and LP

That nice Glendale jack cup is normally an interference fit on a stock Tele body from Corona or Mexico, or from USACG in Washington. I take a large mill file which ranges between 13/16ths and one inch thick along its length, stick it in there and rotate it to clean away coating and sometimes wood, testing for fit. If that Grizzly hole is the next size smaller, I'd still use the same means to enlarge the bore.

Yeah, the ones above are 7/8s inch. And your jack-cup, counting the splines, is between one and two 64ths over that, driven interference fit. Make sure you have a flat spot on the body corresponding to the jack hole, or the cup edges will sit proud as the body curves away from them.

Thanks for the tips, guys! The cups fits in perfectly now. Thankfully, the grizzly body had not only a flat spot for the jack up, but it also had a small lip, so the cup sits flush with the body. This is no question the best Tele jack cup of the three I've tried (Elecrosocket and Standard Fender being the other two).

I bought a 7/8" spade bit, which took off a little bit of wood, but the cup still wouldn't fit in. I started working on the hole with a round file. I was worried about filing it out too much, and the cup not sticking properly within the hole. And then I had a brilliant idea - why don't I use the rubber mallet that I bought!

I gently tapped it into the whole, and it slid in perfectly for a nice, tight fit!