I wasn't trying to put you down Rick, sorry about that.
It seems that the most popular American small engines are single acting 'wobblers', or oscillators as we call them, and don't call for packing glands, and people make them for fun. It is only the last few months that I have been building engines for fun and entertainment, usually I was (and still am) building for my own use in model boats or from commissions where I am asked to build a specific type, so I always build double acting with stuffing glands so I am more aware than most about what is required.
With regards to what I shall now call my 'fun' engines, I hope to be able to fit one in each month, just for light relief, and build them between the other general purpose machining, which pays for the extras I get for my workshop through either barter or donations. I don't sell any of my engines, I swap them for cash.
I don't know whether to do the Mine engine or the Grasshopper, any suggestions.
John