The .125 pockets show a .125 radious in the bottom of the pocket. I dont have a 4th axis on my mill. Can i lay the part down flat and machine it with a 1/4 ball end mill? This will leave a .125 rad in the corners as well will this be ok? Are the barrels chambered after the sleeves are soldered in the tubeing? If so do they chatter alot? Do i need to buy a chamber reamer or can i just counterbore per print. Thank you