I haven't had one, but I checked the schematic in bikebandit and it seems to be pretty much straight- forward work. If You have a bearing removing tool it will make Your life easyer, but if You dont You can use a long punch ot a screw driver to knock the bearings out. On the schematics I did not see anu snap rigs to hold the bearings from outside.To install the new bearings You can use a bug socket with a size like the outer ID if  the bearing. Before You install the new bearings, put them in the freezer for approx. 2 hrs and they will go in the place with a gentle tap. AFTER YOOU PUT 1 BEARING DON'T FORGET TO PUT THE WHEEL SPACER BEFORE YOU PUT THE SECOND BEARING.
Good luck !