I would love to see these guys in my tank
Unfortunately, I am more than likely going to make a move out to San Francisco at the end of the year. They probably aren't growing as slow as you think though. I've had a few more eyes pop out on my piece of Rainbow Crush, but it hasn't grown in size.
Cutting them in two might not be a bad idea. You double to the growth ring and get a full rim on multiple pieces. The BPC is a little touchier from what I understand so that might be something we let remain intact.
Probably a group decision though.