Installation Question V2.0

Anyone having trouble getting a drill bit all the way through their steering shaft? It eats cobalt bits! I have two spring pins in holes that may not be quite halfway through the shaft. I’ve put 5K miles on like this but always worry they won’t hold.
This month the motor came out and I have endeavored to get a hole all the way through. I have hours in and 3 spent bits and I’m only halfway through! when I got the new gear, it was supposed to have come with a bit, but mine was missing. Is there something magical about that bit? More importantly if there is, where can I get one?
Thanks