Ok, here goes. I will admit to toying with the idea of a double blade. I found it to be a very wet proposition. It appears in hindsight that I was not using the paddle correctly. I tend to bring it too much to the vertical instead of sweeping closer to the horizontal. Who knew?
Many years ago in a sportpal, I took some duct tape and strapped two canadian tire planks together to make a double that weighed in at about 15 pounds by the feel of it. It was a short but epic failure. It did make me instantly infamous amongst my peers however.
My current technique is hit and switch , sometimes with a bent shaft used the wrong way around. Just because I am me, and no one else wants to be.
YC, bringing beer to Canada is like taking your own oil to Saudi Arabia. Just buy some when you get here....my personal fave notwithstanding ( Kokanee), you may wish to try Bleu et Cinquante. As Rob can confirm, I drink mostly coffee, but that was not always the case....lol.
Christy