Beefy Ender 3 BMG Mount

I really liked the mount that bytespyder created, but it had one problem: no matter how I printed it, I snapped the mount in two when trying to change filament. I just don't think the sides of the mount are strong enough for how ham-fisted I am!

I beefed up the sides of the mount and elongated the supports, basically running all the way to the end of the mount.