Re: Northeaster Dory in glued-lap?
You can do it, sure. But a simple rabbeting router bit with the guide bearing is phenomenally easy to use. It's far, far simpler and quicker than you are imagining. The biggest problem you are going to encounter to do it the other way is that you will need to build the jig with all the station molds in order to plane your bevels correctly, something that is not provided for in the lapstitch plans.
I wouldn't do it myself, honestly. Seems like much more hassle than its worth. Lapstitch works fine for what it is. But if you are thinking of this boat as practice towards a traditional cedar-on-oak boat down the road, the lapstitch isn't going to give you much progress in skill building in the same way. It's really much easier and simpler and quicker. For boats in this size range and below it is a perfectly reasonable way to go, and probably only 70% of the work.
The John Dory is heavier because it's a noticeably bigger boat with more built-in interior furniture and with flotation chambers in the ends. They really aren't all that directly comparable. The Northeaster is (barely) cartoppable, the John Dory is enough bigger that a trailer is the only practical answer.
I don't dislike the Northeaster, but I'd rather have a bigger boat myself for the camp cruising I do.
Amphibious Macroplankton Oughtredia doublendus
Mostly found frequenting the littoral and estuarine zones in the southern half of the Salish Sea, though sightings have been recorded both north and south of this area, and occasionally, but rarely, inland, in freshwater environments. This species lives on micro-brewed beer and dutch-oven biscuits,and displays brightly colored nylon and gore-tex plumage during the rainy season. Approach with caution!