I just cut a small slot out for the probes last weekend. I had been using the grommet but my probes would fail after only a couple uses. I dont know if that is the reason for failure or not but it is much easier now. 2 cooks in so far...On the subject of WSm's do most people thread there probes through the grommet or just pass them under the lid? I find threading it through the grommet after lighting, attaching the grate probe and then probing the food a but of a faff TBH.