For clarification purposes...
The story so far...
Having basically imported virtually complete Schroutens' machines, with a tax-dodge by installing Hoover motors,
Peter Armstrong's book says:
"The intention now was for Rolls to assemble the machines, mainly from parts supplied by Schroutens, but using some made by themselves 'at a considerable saving'."
and:
"Bloom's account makes it quite clear that the parts to be manufactured by Rolls would be direct copies of those in the Schrouten machines."
thus:
"Schroutens' reaction was a clandestine approach to Elvins (Roll's sales director), inviting him to take charge of an operation to sell their machines direct to the public in the UK, under the name Duomatic. This would be in direct competition with Rolls Razor."
So, Duomatic Organisation was not connected to Rolls Electromatic, other than sharing the general design and some parts. They were in fact bitter rivals, Schroutens and Duomatic Organisation on one side, and Rolls Electromatic on the other.