I didn't have Canadian whisky on hand, but I did use a maple syrup from Quebec I was gifted recently. The Clonakilty Irish whiskey I used is a bit of an overkill. I did very much taste the character of that, and the other ingredients 'enhanced' it in a pleasing way. One doesn't need to wastefully expend good spirits in a drink like this. This might benefit from a dash of grapefruit bitters instead, due to the fact that the grapefruit juice was rather buried in the mix.