Just to show that not all of us are pros, attached is a picture of my first bowl. I had Keith Rowley's book open next to me, but somehow, things went awry....
I was doing pretty well until it came time to reverse chuck the bowl. I mounted it in my Talon chuck and started hollowing out the inside. I must've had a catch or something, because the bowl started to wobble. When I looked to see what was wrong, I had somehow broken the tenon off the bowl.
I scratched my head for a little while trying to figure out what to do. I thought about running the bowl through my planer to try to flatten the bottom, but, mercifully, realized that it would've been a stupid thing to do. I finally planed the bottom with a block plane, which is how I discovered that I'd hollowed out the bowl a little too deeply.
Rather than give up, I decided to screw the darn thing back onto the faceplate and finish it. That's how I wound up with the four holes in the bottom.
Let's just say that I now use this bowl to hold my keys, money, receipts, etc., and leave it at that.
I learned a few lessons with this bowl. I just wish I hadn't learned them all at once.
Jack