That looks great!!
What length are the tubes?
Do you have anything securing the rods in if it happens to tip? Small bungees over the back of the reel, or velcro straps across the top of the tubing?
I have some leftover tubing very similar I used to make fly rod tubes, I’ll have to give this a try. I always seem to have an extra rod or two, or three….leaned up in my portable when switching presentations, this would be a nice quick way to stash them. I never liked putting rods in and out of the bags constantly.