When I wrote the post I guesstimated at 15 lbs but now it is verified at 11 lbs, while my 1980 LP custom is 10.4 lbs. My Gibson 2010 LP standard weighs in at 8.8 lbs.
I can't imagine it's chambered at that weight but it is a very good point you're making about the hardware and electronics though. Looking at the back of the JTV most of it is routed for the electronics so that could be the extra weight. It might bump an Epiphone up into the same range or even heavier.
I also don't like the fat neck and those speed bumps they call frets. (My '80 LP has spoiled me on those low frets)
I bought my JTV on eBay so it's probably not under warrantee at this point anyway. I'm not that worried about messing up the Epiphone - those are a dime a dozen. I'm afraid of messing up the JTV electronics!. But it's not like I'm planning on altering the electronics. I'm just going to hopefully take out a bunch of screws to get it out. My main concern is the bridge - stud spacing, etc. If I use that wide Variax bridge then it might look weird with a tailpiece so close to it.
Since I hate the neck the most, it might be less work to just rework the JTV and put in some wide, low frets and sand down the neck a bit for a better feel. Thanks for the thoughtful response!