I have been trying to install my new gripper seat cover, putting it on and stretching it tight is not a problem. I just can’t find a good way to staple it on! Both electric and Manual staple guns wont work? The staples just twist up or wont go through the seat plastic. I have already looked at Pneumatic staple guns at Sears and Home Boy Depot, but they (Air Staple Guns) don’t have, or I haven’t found yet, 1/4 shallow staples. Sears’s shortest staples are 1/2" 20 Gauge 3/8' staples, those are too long. What have you guys used with success?