K N Harris never made any miniature loco boilers, or a miniature loco, something LBSC frequently jibbed at him with arguably good reason given the jibbing back!
Mike Palmer 1 must be in error in his research.
K N Harris got (in retrospect) somewhat surprising medals for his small stationary engines in ME exhibitions circa after WW2. You will have to look at the details why I say surprising.
However he had a time served engineering background with a decent steam engineering company of stationary and I think marine business. He never had any experience workwise of loco work.
He was a most clubbable personality of great wit and skill, and at people management. He was a loud personality in presence and appearance, with a 'loud' checked suit usually and equally loud tie.
He got the best of Jim Ewins in a famous club meeting of the SMLS in the early 1970s which is still recounted.
However, this is all completely 'off topic' for which I apologise.
Cheers,
Jlian