While I understand your frustration, and support your 'right' to use your own equipment as you wish (provided of course you're willing to take responsibility for your actions, which I know you are), it's just not possible.....as it would not be safe.
Whatever you do, never, ever put maybe two dimes in the outer tube before the inner tube. That is if you're foolish enough to ever pull out the battery tube and drop them in and screw it all back together you'll notice it comes on as you screw the adapter interface (the bit with the switch) back in. All the play goes out of the slide and it comes on without your pushing up on anything. And it stays on until you realize the error of your ways, repent, and unscrew the adapter interface again. You might think you just invented as somewhat hot after use rotary switch, but you'd be wrong.....you didn't actually invent anything.
You might even find you can slip the coins out (and maybe in?) through the window so you don't have to pull the inner tube all the way out, just lift it up some....
If you burn the joint down I don't know you......
OF