Hi, Bill
Not trying to split Hair's hear, There some part's that Dave has sitting around, Now, On Hand.
6000, 11.666666 steps per, You get some rounding, .0143 .02 .03 deg, 12.5143.
Even with 9000, 25 steps per, You'll still get some rounding, .02 deg. 12.5 is shown as 12.4800.
Now 7200, 36 steps per, seam's good, So dose 1440, 7.2, 144000, 400 steps per.,Hmm.....360 ?
73400, 367 steps per, 12.4986.
NO Hair Splitting Allowed, Chip
PS: PI are round, Cornbread are square.