They drilled out the tube to 19mm for the battery area ( hopefully, IF they followed the drawings ???? )
the digital reader i have on my box serves as a battery charge level indicator as well. i dont know why im saying it but i think its cool that when i see that i only get 3.5 under load (running on single batt mode bypassing variable) its about time to pop my charger into the usb on the box
can i post a link to my varbox? im posting it. Mr Buzzetti might incorporate some of the ideas into his future projects
YouTube - Variable voltage w/mini USB, digital reader and bottom feeding.wmv
I have been looking for an LCD mini screen like on an MP3 player but those are all custom made for the product ! DAMN !
Don't know if this will help, but there are quite a few displays here:
LCDs (Liquid Crystal Displays) | AllElectronics.com
And this is the switch(slide pot) I was talking about. 19mm long, pretty good size.
20K OHM SLIDE POTENTIOMETER | AllElectronics.com
the slide look good for something other than the buzz, it looKs too big. I think if you are going keep it it the nice tube (and that tube is NICE) has to be a an adjustment the user makes with a SD, we all deal with it,the whiners won't buy one, KISS for the tube Buzz.