I know this post is on an old thread, but I feel compelled to comment on the choice of joinery. Specifically, the use of the relatively more expensive Festool Domino mortises, instead of the previous generation's joiner, the venerable biscuit. My line of thinking is simple: I use whatever is the most inexpensive method available to me, to accomplish the task at hand. Just because one has a shiny new machine doesn't mean that's what needs to be used, does it? I own a 500 as well and use it quite a bit in my work... but only where it's most appropriate.
The second point I would like to raise is the glue that was selected. In this instance, pva glue would have been a much better choice as it won't ooze out of the joints as much as these expanding glues do, thereby making a mess that requires a lot of additional work to remove.
I would like to add me comments on the finished product, as I think it looks great.
Good luck with your future joinery.