I've used a ton of kydex sheaths and Teklocs and always have only used them with two screws. I have never had a problem. Plus, you can put it towards the front or rear edge and get the angle you want for carry purposes. The only real way around it is to get a nice custom leather sheath built for it. Do a search for Armoralleather. He does great stuff. He actually lives just down the road from me so I know him and have had the chance to see is work up close. Great guy who does great work. Also, Spyderco makes a verson of the Tekloc. I can't remember what it's called but you can use it for IWB carry with kydex. Again, you have no worries just using two screws. You can always put a drip of blue loctite on each screw and they won't go anywhere.