Sorry, I missed this. It was very difficult. Skill level 5 out of 5. So now the controller went bad. I cannot fix it without a schematic which Topre will not supply me. I purchased another board. since I have so much money into this board and it is my favorite one. I have a one of a kind anodized titanium case, paracord,silencers,GMK caps from 3 sets. It is just a bummer that the same board is twice the price now. They are now asking even more for the original(Seasonic). Ridiculous. However, with the silencers and GMK's it Thwacks instead of Pings like a right proper Topre should. Plus the more rigid case and it's acoustic properties may have something to do with it too. I am not sure. My back plate is also painted black so with the GMK's on high there is very little light out the sides and none out the top. I like it this way. Of course I would not recommend anyone spend the(undisclosed) amount I have. I am sure you can do all this for much less. If these boards only last a few years though that kind of sucks. I am kind of "locked" into it now, it being my favorite and after what I have spent. It is by far my most expensive board right now. No pictures right now as it is currently in many pieces. Plus I am not sure if this site hosts pics any longer?