I used to do the step wedges a lot. Many things have happened in the meantime. Things as well as memories have been lost. Ron, did you learn all that you know in school, or is much of it the result of experience and practice? Please don't refer to my lack of education in chemistry. I have had an attack of meningo-encephalitis since then that nearly took me to the pearly gates, and left me having to relearn many things. At least I know enough to ask questions, and am still capable of learning. That I can count among my blessings.
I'll see what I can do with step wedges. I'll have to relearn that as well.