Filament often gets stuck in the nozzle? Check this out!
This attachment fixes the existing spool holder on the frame. It reduces undisirable stress on the filament and makes the feeding smooth.
Actually, there are already a lot of spool holders which keep the spool above the printer. But I think this one is the simplest solution.

How I designed, printed (and sometimes failed) my things.
http://lunran.sakura.ne.jp/wordpress/

How I designed and printed this thing.

http://lunran.sakura.ne.jp/wordpress/2013/11/10/%E3%83%95%E3%82%A3%E3%83%A9%E3%83%A1%E3%83%B3%E3%83%88%E3%81%8C%E5%87%BA%E3%81%AA%E3%81%8F%E3%81%AA%E3%81%A3%E3%81%9F%E3%81%9D%E3%81%AE1/

http://lunran.sakura.ne.jp/wordpress/2013/11/11/%E3%83%95%E3%82%A3%E3%83%A9%E3%83%A1%E3%83%B3%E3%83%88%E8%A9%B0%E3%81%BE%E3%82%8A%E3%81%9D%E3%81%AE2/

http://lunran.sakura.ne.jp/wordpress/2013/11/16/%E3%83%95%E3%82%A3%E3%83%A9%E3%83%A1%E3%83%B3%E3%83%88%E8%A9%B0%E3%81%BE%E3%82%8A%E3%81%9D%E3%81%AE3/