I don't think most people have any idea how long it takes to build a case, lots of steps and lots of waiting on things to dry are involved. I had guys think it only took two days to build a fully carved case, it takes that long to draw the pattern.
Oh, no sir I can't. I retired from the case business almost a year ago.
Sorry sir, I've retired from case making, I was just trying to help you get the interior out. Like I said it should just pull out.
Ususally you can just pull the entire tube out, material and all by grabbing the material in the tube and giving it a yank. I know my 2x4 tube cases fit a 2x4 JB interior so maybe this will work for you. If you can get it out and the tubes don't fit you can always put the old one back in.