Ray: DMT offers a 6 inch extra course Diamond Stone that can be used used with water. Do you think that will do the job to remove the hump from the flint top surface?
Remember to wear a dust mask whenever you grind flint. The tiny rock dust particles can lead to Silicosis,a lung disorder somewhat similar to Mesothelioma from breathing asbestos.
Ray: Do you agree that I Could use a DMT stone D6X (extra course) with the water treatment you suggested. Little confused if I should use a stone or a hone?