I don't think I'd sell that smoker box short. It is stainless steel right? I had a very similar type one on my Genesis for many years but eventually because it was not stainless it simply rotted away. But, I used the daylights out of it. I smoked everything from ribs and briskets to even whole salmon and lake superior whitefish. Frankly I would love a setup with a dedicated smoker box and burner such as the Summit has. BTW my argument with Weber (as a whole) not just one particular model, is not that the product is "poor quality". It's that at the lofty prices the things like spacing of the grates, and so much of the product made in China really should not exist. Sure some small insignificant parts but when I put together my sister's Genesis the only things I saw that were not from China were the main stampings and the fire box casting. My other "issue" was the way my situation with my Summit was so unceremoniously "dropped" by Weber. Going from "oh sure we'll get that part right out to you since it's under warranty" "to too bad so sad" even though the part is warranty we don't have it or make it so "thanks for buying a Weber". Truly not class support especially for such an expensive unit. Heck I would have been pleased if they came back and said "so sorry for not supporting your unit" "Here is a voucher for $xx.xx off on a purchase of a new Weber grill of your choice". Nope, just dumped like a hot potato. For the record that grill was well taken care of. Failure had nothing to do with lack of maintenance. Witness my Genesis II bought 12 years before is still going strong even to the point the original burners were still in use in it up until 3 years ago and even at that it only needed one replaced. The crossover and 2 others are still in use nearly 25 years later. Thankfully once I get the time thanks to Clint I was able to purchase another panel for the fire box so my much loved Summit will be back in service soon. Would have been sooner but other projects are taking precedence not the least of which was being extremely ill due to food poisoning most of last month and much of this. (beware avocodos from Mexico).
So please don't misconstrue my opinion of your 470. I think you have one fine cooking machine there. I just wish Weber would not stoop so low to the profit gods as they're beginning to.