18650 Lantern Battery Adapter Split Version

I have an old 6V Varta battery lantern, with a 4 x C battery adapter. As I fitted a LED light on it, I wanted to use some 18650 cells to get maximal autonomy.

I printed TimH's adaptor which fitted exactly my need, but hurted my fingers a few times trying to solder the wires to the springs. then i took a handsaw and splitted it apart, but the result was was ugly as well as deformed. So I splitted the original file, making the assembly much easyier.