The thing that makes the midhorn kit attractive is that it is CNC cut and the angles and everything are made precisely for good fit. Miller dowels are used so that clamps aren't required for assembly. The cabinet shop has several jigs specifically made for building them, and they are very precise. Some of the dimensions change slightly depending on whether you use 18mm Baltic Birch, (which is 0.7"), or 3/4" or 5/8" stock. So you don't have to wory about these details when you buy the midhorn flat pack and it's nice to have a precision cut part to start out with.