I started milling my board with the hope that it will be a fast - simple process, only to realize after the milling was done that the endmill was broken! And it was not the only broken endmill !!!
This was the part that I worried about the most in the beginning as I was totally unfamiliar with soldering. First, I did some practice on one of the many failed milled boards, and then slowly I started soldering in my board. I was in the final state of soldering the ISP, and accidentally as I was trying to align the ISP I pilled it off and ruined my board!
First I had to make sure that I connect the ISP of the board in the right direction with the atmelice programmer (ICE orientation), otherwise the red led will not turn on. With the first try it worked!