I have a question about studs for wading boots. I bought some Kold Kutter screws (3/8 inch) and have put them on a pair of wading boots that had a different type of stud. The fit was perfect. I have another pair of Chota wading boots that are felt bottom with no studs. Have any of you added studs to a pair of wading boots that did not come with studs? There are no pilot holes for the screws .... just a plain, felt soled bottom. Would you pre-drill a small hole and then put in the screws. Would you abandon this idea and get some boots that have studs? Thank you.