I hate to be the bearer of bad news, but the MS98000T is the one you want. I know it costs more but the 98000t is the solid aluminum core one that fixes the gasket problems...you can use the MS90131, it'll fit and everything, but its not the one I'd recommend
This is what I was getting at, just got busy and didn't post a followup. Definitely return what you have and get the better ones, as they solve the breakdown issue with the plastic frame.