Similar idea but there is a transfer tube between the two jars and the lines out aren't in any fluid so you cant risk sucking it into the engine.
I like the look of that. I think I'd put the transfer tube on the bottom though. And maybe use taller, narrower containers.
A easy way to restrict the tubes is to clamp a small Vise Grip on the tubes and turn the adjusting nut until it squeezes the tube the right amount. A small "C" clamp would also work. I did this before I got the Morgan Carbtune.
The part # Marshall posted is what I have been looking for! But, will it work with vacuum? It looks to only work on positive pressure?
I understand the tools to measure the difference between the two carbs BUT my question is where and how do you connect it to your carbs?
I set mine up when I had the carbs off the bike and adjusted to get the butterfly's in line don't think It can be far off.