Watchman Half Dart Expansion

For small printers and people who want a larger katana here is a clip on expansion, a better suitable spring, a follower with space for one spring layer to adjust the spring and a clip in endcap (endcap is untestet yet but should work). I added endcap and mainbody from ImMortis so you have all you need ;)

didnt used support at all, only the magrelease port need one cut then.