Did a little more yesterday and about 1hr today. Only with the cordless drill today out back while the kids jumped on the trampoline. Yesterday I did a couple hours with the air pneumatic grinder, that thing does work, just a bit of stop and go so the tank has enough pressure.
They definitely are getting better. I tried to focus a little more on the valve guides, where it diverts into 2 directions around the guide.
All 4 ports and bowls are "roughly" the same size.
I did realize, at the spot where the burr is, there is a casting flaw in all 4 ports that I need to remove.
I also purchased another handpiece off Amazon that should be able to hold the 1/4in drill bits. That will make life easy