The joker body is way too big for Walt. Walter is more like a narrow shoulder body.
Trevor only sculpted the shoes to fit a sideshow body because he was hoping sideshow would of picked up the license.
Just so you guys know, sideshow foot pegs work also at a fraction of the cost, buy any sideshow shoes, boots etc from Toy Anxiety or Monkey Depot. $2
The Narrow has wider shoulders then the Joker 2.0 body! It's purely my opinion but the 2.0 body is far better suited than the narrow. I used to be in the narrow shoulder camp till somebody pointed out my mistake and I actually compared the 2 in hand.
As far as I was aware Trev sculpted the shoes to fit the perseus legs as that is what he used on his Season 1 Walt and that was the figure he went with first. I could be wrong though.