Tried to install the bridge thimbles myself in my new jazzmaster body using a rubber mallet and a towel. One ended up being slightly uneven and not flush with the body. I'm too afraid to keep pounding harder in fear of damaging the body, plus it doesn't seem to be doing much. How big of an issue is this? Should I remove the thimble and try again and if so, how do I safely remove the thimble? Lastly, the other thimble is even, although it stills isn't completely flush with the body. There's a very very tiny gap. Is that an issue? Any help would be appreciated.