Leo Kuzmiki (sorry for the misspelling) was a lecturer before 1940 pecialising in internal combustion engines at one of Poland's leading technical universities before WW2 and he like many of his brave country men went over to England to fight against the Nazis. The UK Poles were predominate in Air Force roles of all the European expatriates. After May 1945, Leo was demobbed with '000s of other soldiers and found employment as a janitor - sweeper and cleaner at Norton's Bracebridge Street factory.
One day, in the Experimental Shop (the test facility with the wet Hennan & Fround engine dyno) Joe Craig the Master of All Things Manx came in and found Leo chatting with a young English engineer - (sorry can't remember this chaps name) and being Joe Craig (JC) he gave them a verbal blasting for "wasting time etc' etc' " - but to the young man's credit he stood his ground and informed JC that here before them they had a valuable expert in cylinder head design, the very substance of what that had been discussing.
End result is that that the penutlimate head for the Manx was designed by Leo K. JC died in a car crash in 1956, shortly after his wife had passed away. JC was not a qualified engineer but a very dedicated and focused man on the singular objective of making the Norton Manx single the most successful racing motorcycle of its time. And in its day it was. Hats off to Leo K.
Mick