I have looked at the KSG and have a problem with knowing when you are out of rounds in tube #1 and need to switch to tube #2. In addition, I would prefer a semi-auto.
I envisioned a mechanism where one tube is primary and the other is backup/manual select. IOW there is a selector and you can use it that way manually like say with different loads in the two tubes, but if you put it on the primary tube, it will automatically switch over to the second tube when the first one empties. Does their selector not work that way?
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That reminds me of the scene in Dirty Harry:
"Did he fire six shots or only five?" Well, to tell you the truth, in all this excitement I kind of lost track myself.