Having bought my place some time ago, I have only just noticed that the griller in this oven is only attached by screws on the back wall. There are also two holes for screws in the top of the oven, but the necessary fittings on the griller itself are not aligned with them. The griller seems fairly firm (although tilted slightly downwards), but I would feel a lot safer if it was attached at the top as well. What options might I have for fixing this? Regards, Bruce Anderson