I have an MX28B sporting for which I would like to get 410 barrels. The dealer said it would be optimal to get a dedicated forend and forend iron at a total cost of ten grand. I have seen combos advertised where the smaller gauge barrels have wood spacers bolted to the side to fit the larger forend. Does anyone have any experience with the latter setup? Is it stable and durable? I only want this for shooting small gauge events so we are not talking about high volume usage.