This is a good product but very difficult to level unless you have a router system that increments the router up and down 1/1000th of an inch. You should consider including a 3/4 inch plastic template to help with the initial layout. It comes with no instructions, so you'll have to turn to the internet to find out what the "golden spot" you're trying to level your board with is. While the connection looks very cool, they use the more traditional Whiteside 3375 tenon and mortise, which is 10x faster to set up and looks just as good.
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