Nice looking. How do you attach the "floor" to the inside of your bag? I assume it rests just above the lower zipper? Interesting concept.
Hook and Loop. Loop sections sewn into the walls and perimeter of the inside of the bag, Removable floor has 1" hook sections that wing up to mate with the loop sections ® and ™.
I made a bag like this 3 or 4 years ago and it worked fine touring in Chile. If I want to use it as a single compartment bag, just pull the floor out. If I want to angle or lower the floor I can move it, hence adjustable and removable ® and ™