S1: Will ProTemp S1 fit on the Weber Summit Kamado or will I have to drill holes in it?

Thanks for your interest. The ProTemp S1 fits the Weber Summit Kamado. Remove the analog gauge and replace it with the Universal version. Don’t drill holes in a ceramic grill. If our answer hasn’t resolved your issue, please join our Facebook community group and post your questions there—we’re confident they’ll be addressed quickly: https://www.facebook.com/groups/chefstempofficial!