Tapped Blind vs. Through Holes

I mentioned my joy that CFC taps fine if you do it with a hand tap.  This had another pleasant result. 

I had planned to hold the slow motion control axis that drives the worm gear in two pillow blocks.  I was going to bind them to the 1/4" CFC base plate with screws going through both.  Trying to turn the socket head screw while holding the nut on the far end was clumsy, especially when you are holding 6-32 nuts in big fat fingers.  Using tapped blind holes means that there are no nuts.  I can just screw the screw through the base plate and into the pillow blocks.