I have a heavy flywheel version like yours Rog also but it came with a circular magnetic "pad" the same size as the bottom of the burner which incidentally doesn't have a handle like yours. It is a treat when all goes well but can be irritating when it doesn't want to run right. Just an idea but you might try embedding in the base material some of the small circular "super magnets" as they're probably stronger than that magnetic material you've got now.