This rebuild Kit for Wanhao D9 Extruder will make it possible to use the latest revision of the new breakout board that have a wider clip than before. The older existing breakout board was marked with V1.5, the new board is marked with V1.7 as you can see on the product photos.
The rebuild is easy and will take approximate 20 min to rebuild. This will also make the Wanhao D9 extruder kit to be compatible with the new MK2 upgrade kit that just have been released by Wanhao.

This kit consists of a new rear housing and a new cover.
Please download the installation guide here