Power Query use List Product in let statement

Hi,
I've just about got what i wanted to acheive in I have tablle of 1 and 0, and want to replace the 1 with the corresponding column value form another table.

the code I have so fat is ; LK = singe row table with replacement values.

Please Login or Register  to view this content.

This give me a column of lists which I cant then use Table transform columns with List Product,
But have been trying to put this final step in the above and keep getting it wrong.

Attached , Problem query = AddColumn

Thanks,
I'd tried several places, and of course i forgot about nulling the zero's. I'd give a rep but can't.

Richard.