Would have helped if I had looked at the photos of the radiators.
Yes the Big Momma cannot be 1 Pass, and Rad E cannot be 2 Pass(could be 3,5,7 etc)
. For the record the difference between 1Pass and 2Pass on Big Momma .:-
Apologies for confusing the issue.
To quote Bill "there is nothing that cannot be made more complex"
I am certainly capable of that.