C to D Cell Adaptor

I needed to put batteries in a camping lamp, but couldn't get D Cells and had C Cells to hand, so I came up with this. The C cell is 11.5mm shorter than a D cell, so to make the electrical circuit this adaptor requires a small screw of that length or slightly shorter screwed into the hole at the end. I used a 4mm diameter cap head screw that was about 10mm length including the head, which worked for me as the lamp had large springs on the -ve contacts that took up the extra 1.5mm space.I set the print profile to print in Draft as these just have to work not look pretty.Boost MeIf you find these useful, please consider giving the model a Boost to get it shared more widely.