I have a Parker with the Parker SST and a vent rib and ejectors but no beavertail.
Your topic is interesting to me as I have often wondered how and why options were ordered....as we've seen from past price lists they can add seriously to the price tag. How many people said to themselves "Why order a D grade with all the options when I could practically get a B grade with no options....?"
I'll also bet a bunch of Parkers were ordered, especially lower grades, with the buyer having no knowledge that options were even available.
