well in fact none of the two bottom mpc work for me I get a z-axis stall E06-0324 error. this occurs after the board has been turned over from doing the top carve which it does just fine and the bit find for the 1/8 cutting bit is done and then it asks for the 1/16 tapered bit and when you put it in ...it trys to do the bit find and fails when up on the bit plate with the error message mentioned above.