Genuine Bondtech DDG Extruder Kit | Replacement for Ultimaker 2+ | (EXT-KIT-41)

This is an excellent upgrade if you plan to work with abrasive materials on your UM2+. Helps increase extrusion performance with other materials as well, such as flexible ones like TPU. The E-steps do need to updated, but that is well documented on the Bondtech website. In my case, the custom firmware I'm running allows you directly change the E-steps.

I am very impressed with this upgrade. Bondtech has really exceeded my expectations with this dual gear retrofit. It has really increased the reliability of my Ultimaker 2+. The original feeder was nice although, this system is really consistent. Definitely would recommend this upgrade for a 2+ or 3