At the risk of perpetuating the thread drift... I never heard of the 3 cylinder inline Pops mentioned. Must have some funny vibrations if the stock crank was used. There have been a few 2 cylinder 1/3 Corvairs, but parts availability and cost and the smaller displacement make them less attractive than half VW engines. There has been some discussion on it here in the past.
Thats what kinda get's me, OP made no "personal" comments, Sounded like WW was posting a warning that was personal to him and others. Also basically added some back up to his claim. I guess we are all human and make mistakes. Lets just hope the mistake is not discovered at around 500 ft. AGL. Off topic- UK SIMPER FI our thoughts are with youInterestingly, the OP made no "personal" comments in this thread and the factual nature of the information contained in post #1 has not been called into question in six pages of discussion.