Ender 3 v2 filament-insertion tools

Tools for changing filaments, with the stock extruder on the Ender 3 v2. (I believe they'll also work with the original Ender 3).

####The problem####

When changing filament, it can be hard to align the filament with the hole inside the extruder; the process seems to require either 3 hands, or perfect pre-straightening of the filament.

But no more, with this tool kit!

####The solution####

- Squeeze the extruder lever to open its jaws, then put the clip over the top of the extruder, to hold the lever in the depressed position. *This frees one of your hands.*

- Use the alignment tool to push the filament down to align with the hole inside the extruder. The tool has a little shelf that will stop you when you reach the height of the hole. *I find I always need to push the filament down, because it naturally curves upward so it tends to hit just above the hole.*


####*Epilogue*####
These made the stock extruder a little nicer to use. But still, I eventually upgraded