Hi – thanks Ady1 and Jason, it does have a look of the Osprey about it, except there are some differences, for instance, from what I've read so far would indicate on the Osprey that the push rod tube acts like an air intake tube as well and the fuel/oil mixture therefore floods all the crankcase providing lubrication throughout, whereas my engine takes inlet air straight from the crankcase, not that an air inlet into the crankcase is provided for just yet! But there are similarities, certainly. So now for plans.
I might start another thread to see if anyone has plans of the Osprey, seeing as how Gerald Smith is sadly no longer with us, rather than continue and confuse this thread.
Chris