I installed my pods from Nickola a couple days ago. No drama at all. It has a minor off-idle lean stumble, like my '77 GoldWing, but only 20% as bad. Stumble is probably too strong a word. It's more of a sag, and a certain tendency to act like a two-stroke, in the sense that it runs best under load, and misfires a bit under neutral throttle. I have no reason to believe that it wouldn't run exactly the same with the airbox.
On the GoldWing, all it takes to fix the off-idle stumble is to implement Randaak's "off-idle fix" which consists of installing a restriction in the air bleed circuit for each carb, which is is transformational. In the case of the 1300, I have hopes that uncovering the idle mixture screws and a very minor adjustment will take care of it.
I've only put an additional six (6) miles on the bike, by making concentric circles around Fossil, so if it had another carb issue, I could walk home for tools, etc. On the other hand, it got fully up to temperature, didn't smoke, although it did seep some coolant, so that's the top of the new list. I'm within 10% of trusting this beast to the 19-mile trip to the nearest town!