Still working on my .54 Colonial, they seem to be 40% easier to assemble than shown in the videos due to Jim improving his kits. (Everything threaded is drilled/tapped, tenon's are integral with the barrel, liner is installed in the barrel.) My first muzzleloader build, and already order a .45 SMR. The most time consuming part so far is fitting of the trigger guard and the entry pipe for the ramrod. With the CNC stock you don't have much extra wood to work with.