not for a control freak

I've said this before...I'm a control freak. I like to know where I'm going, how I'm going, why I'm going and I like to know what the results of that going are going to be...so when I fire a load of buttons and have less than full control, let's just say the fingernails are the the second to go...the stomach lining was the first.
I fret and I stew and I nervously go through the protocol that I use to fire the kiln...and then I wait impatiently for the kiln to cool so that I can take a peek at the little gems.
I am learning to endure...not enjoy mind you...but endure the process to be able to see results like these buttons.
So out of about 150 buttons done in this particular batch...7...SEVEN...only seven came out with these combinations of colors. The yellow is very pronounced. We know what makes the yellow...but why only 7 and not say, 100?
I think some more experimentation is in order...perhaps I'll lean on that "quality" of mine that wants to be in control to set up the tests...and then shift into that ability to endure the wait to see the results.