I can't believe it, but I got it on 2nd try! When I saw the board, my thinking was: if it's here, it's meant to be used. So from the first, I tried a route using it and it brought me straight into the right configuration for the winning route. Big part of luck to start with it first thing. :D
Sorry if it doesn't make sense, but I try to avoid spoilers LOL
The final two save here was actually quite difficult. This originates a move I simplify in "Simple addition" which thankfully saved me some attempts :)
