I don't place musical instruments up on a pedestal like some some folks do either.
I think Berry Oakleys bass was great and Mel Schacher's and Billy Sheehan's, and Yngwie Malmsteems guitar and Eddie Van Halen's guitar and lots of other instruments improved by making mods, including my Jazz bass with a Thunderbird pup.
If something useful is gonna be added, I say let 'er rip, but the JC bass does not need an access panel, it provides no additional sound or playing improvement....as I said before.
Cutting up the back of a semi-hollow body to replace an output jack is a dumb reason
You made an assumption about my age and now assumptions about what I think of modding basses...try not to read too much into my comments about an unneeded mod...