I have not tried the beer you listed, so can't say anything specific about cloning it. But I tap my own trees and have experimented with getting maple flavor into a brown ale (Caribou slobber base). Mashing with 7 G of maple sap -> bumped up the OG by 10 points, but no maple flavor. Priming with maple syrup at bottling -> no maple flavor. Both techniques plus 2 oz. maple extract -> that worked, but it was more the artificial maple walnut icecream flavor. My research on it seems to indicate you need to add about 1 G of maple syrup to get any flavor. And that's wicked expensive. My next experiment will be late spring when I tap my trees for this year.