Royall indoor boilers

[MNfarmer]

Hi all.. just wondering if anyone has a model 6526 royall indoor boiler. I bought one last year from an older guy that only used it for 3 years then it sat in his basement for about 13 years. Anyways where the firebrick sits on mine is off centered, so on one side the bricks fit in nicely, but the opposite side sits farther under the water tank of the boiler and is a lot harder to fit firebrick into. Does anyone else have this model or have a similar problem?