Looks really nice! Great idea with the loops too. I would have added another flap to keep the business ends of the tools from touching, but thats just me.
Course, my carry bag is a nylon laptop carry bag that has a divider in it so I put one of my marble slabs in the back and the original Nature Tand box with my current projects in it with a ziploc bag of tools. Gets kinda heavy with the marble, but it has most of what I need.
Mind if I swipe your idea?