OK, so the repair is easy but getting the puppy open is the trick. My MIJ had four loose tuners where the string post had noticeable play when pulled in and out. The trick I used was to remove the tuner from the guitar, leave the threaded barrel off, hold it by the string post, and shake it lightly side to side so that the body rotates slightly back and forth. You're basically wiggling the screw back out with gravity helping. I tried a bunch of different methods but taking a loose tuner and doing this had the thing apart in 5 minutes. Do it while watching TV and it won't seem so boring. You don't need the string post all the way out. Once you have 5 or 6 mm of play you can push the cap off the back with it. It pushes off easily so if it's not working keep wiggling. The string post has a shoulder on it so you need to back the screw out of the end of it enough so that it reaches the cap. Here's what the tuner looks like in a nice exploded view. Watch for the plastic washer that sits on the shoulder of the worm screw. Sometimes it gets left in the housing. No big deal but don't lose it. There should be three washers total for the worm screw; one on the shoulder, and two under the bit you grab on to when tuning. When reassembling, put some threadlock on that gear screw. You don't want to see it again. Make sure you put plenty grease in there. Don't overdo it but keep it lubed. The grease I used is blue which helps with cooling. (Or did I just make that up? ) Just press the cap back in. You'll get one shot at this so if you're anal like me about the text lining up take your time. As I said I had 4 loose out of 6. The ones that weren't loose would come apart. I guess they don't need to though. I put those at the farthest end of the peghead so that the string tree will create a break angle that won't tend to pull them out. YMMV but it worked for me. Hope this helps!