Hi all. Can you please tell me the best way to drill a hole in plywood with a hole saw? Every time i use a hole saw to try to cut a hole in timber, being it plywood or floor boards, the hole saw jams and springs off my hands, the pilot hole bit breaks and i nearly break my wrist. I am surely doing something wrong! Is it best to use a battery drill or a 240 V one? Low speed or high speed? Thank you for your advice.