Ask A1 I'm not sure if Mike or Greg can fully answer your question but they had a salvo in the shop and they are pretty damn knowledgeable on the stuff they sell.
There are a ton of videos on youtube for the Salvo. The cans are expensive and you need (or at least used to) different mounts for different shotties.
Go to SiCo's website and check them out.
It works well I have one with Mobil chokes for Benelli. At 8" it's still hearing safe and it's a joy to shoot without hearing protection. It is like taping a brick to the end of your shotgun barrel at 25+ oz at 8" and 34oz at 12". Cleaning is recommended after 1200 rounds but it's filthy and hard to take apart after 250. Rods clean pretty easy with oil and a scouring pad. They get melted plastic and carbon in them. I've only shot birdshot through it. Balance is nice on the Benelli Montefeltro with the 8" salvo the gun balances in the center of the gun. On the Nova pump it works well too 18.5" Carlson barrel with ghost ring sights. This setup is actually heavier than the Montefeltro but more compact.