Hello! As I mentioned in my intro thread I managed to obtain a (I think) not so new HP-C from ebay. There isn't much info on them as they seemed to exist in that scary time before the mass use of the internet (sadly I'm old enough to remember that!). So if there's any fellow err, less young people on here who remember how these work that would be great! To give you an idea, look at the box: It has a nice velvety inside : My question was regarding taking the back end apart. Have a look at this photo: Now, part 2 is the bit you screw in and out to adjust the needle-spring tension. It does not screw 'all the way' out - you can't remove it from the brush. So my question was, does part 1 (from the photo) - the bit the handle screws onto, unscrew from the body of the brush? I've found this screw on the bottom: Loosening that doesn't seem to make anything happen... I don't really want to grip that brass thread and try and remove it forcefully as I'll end up never being able to put the handle back on, which would be a shame.