John, a twin only has two cylinders. It’s a 5.3cc flat four “boxer” engine we are after.
There is also an earlier mention of a “Flat Four 4-stroke” but whether that is the one Emgee wants or the Peewit I am not sure. Only a single issue of Mod Eng World also seems a bit short for a full set of plans, maybe just an article about one of his flat fours?
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