Power Query Transform Column Names, condition , multiple

Hi,

i have been able to transform column names using a record like so create a record of column and function ;

Please Login or Register  to view this content.

then use that ;

Please Login or Register  to view this content.

so this seem quit similar to a list of { name, function }

so I tried just one;

Please Login or Register  to view this content.

but is cannot get this construction to work on a nested list of column names and functions; i'd thought that ;

Please Login or Register  to view this content.

flist = nested col , func list.

I can sort of see what the problem is in it is returning a list, but have not come up with a way around it, I have tried, function.invoke,
which did not help, any suggestions on how to get this to work? I have attached the above/

Richard.