G'day Victor and welcome aboard mate.
I liked it a lot, I had it for about 2 months befor I droped one end and broke it. I used Gorilla glue and taped the seams, when it hit the concrete it cracked up the stem.
Here is the problem, had you used epoxy resin and wood flour to glue the stem plock to the sides, you join would not a failed. Cheaper glues might hold for a while and stand up pretty well to normal wear and tear but the fact is they will not offer the same sort of strength that an epoxy glued joint does.
I have built a couple of Matt's superb pirogues and one or two of his other boats and can vouch for their quality. I love them. At the moment, I am also playing with a UJ pirogue at my work. Uncle John very kindly gave me the plans to use as a training exercise for my men. I have to tell you that I love the lines and the simplicity of this boat. The more I look at her taking shape and shine
the more impressed I am with the utter genious of the design.
Jem pirogues and UJ pirogues are very different boats and build techniques but equally as good as each other, provided quality adhesives are used in construction. Personally, I would consider anything other than epoxy to be an inferior adhesive and would not recommend using it.