That looks awesome. Great job!
I have a designated tying area but I always tie off of a portable desk. I like the flexibility to tie anywhere in the house. My portable desk was crudely made by my father and can best be described as a piece of crap. But it was his so now its mine and it will never be replaced. Having a wood shop I have also built a few for friends. heres what I learned from my dads and incorporated into the ones I built.
1) I like my thread, lead, tinsel and tubing in reach. I found I can not have to many dowels to store them on. When I think I have enough I wish I had 6 more. I have pretty much maxed out the dowels on my dads so I may build an extension but I really don't want to change his design to drastically.
2) I like bobbins, lots of cheap bobbins. I have a dozen holes up one side just for bobbins. I always need more bobbins.
3) my scissors, wire cutters, whip finishers, magnet on a stick, bodkin, threader go up the other side
4) I don't like shallow wells since they are not versatile enough for me. Instead of using the shallow wells I built about a 4" wide box with four compartments out of 3/8" material. It runs the length of the desk and its height matches the side rail. It is not attached to the actual desk. I use it to store my head cement, uv light, super glue, hair stackers, combs and brushes. It has plenty of room to temporarily store the stuff I am actually using at the time. I'm kind of goofy in that I like some semblance of organization while I'm actually tying.
You built yours well. Have fun with it.