The startime case needs a bezel assembly. So add a bit more to the mix. Overall everything fits like gen. The crown tube has the proper step for the tube's oring as well. Case back is correct and fits the tool's teeth perfectly. However, I had to open up the lug holes just a little bit as they did fit the gen bars, but not to my liking. I softened the corners because I wanted a 16800 build. This is of course for the 3035 case they advertise. I haven't purchased the 3135.