Reworked parts for hidden blade

I reworked the files to make this functional. I also solved the extended blade lock function with a simple part that is both durable and functional. I haven't broken mine yet. Let me know of any issues if you have any and as always enjoy. This only contains the worked on parts. The rest need to be downloaded from the original.

I recommend printing at 105% if your printer bed is large enough, for the entire model