As some of my trapper friends know, I spent some time earlier this year experimenting with different material for a trap pan cover. This past century and part of the one before that trappers used waxed canvas and other material. Then waxed paper became popular, hamburger patty covers, coffee filters, toilet paper and such. Not many trappers know that the Government Trappers of the 1930's began using steel screen on their coyote control lines. The problem with the waxed canvas and other paper products is that when it rained, the paper sinks and exposes the outline of the pan. There was also the scent factor. But the number one reason they began using it was because it increased the kill area of the trap. If you will look at pictures of the olderNorthwoods and Montgomery traps from that time period, you will see quite a bit of space between the edge of the pan and the jaws. According to many Government trappers observations from that time period, they experienced quite a few misses due to the coyotes missing the pan. The steel screen developed was of very fine mesh but stiff enough to act as a pan extension inside the jaws. Craig O'Gorman began using this screen when he was a Government trapper. Government studies estimate that there was a 20% loss or misses on Coyotes without the screen wire. For some Trappers, a 20% loss may be acceptable, but when you are getting paid $100 per coyote on ADC work, to me, it is not. To be used properly, it must be cut about 2" longer than the trap, the area of the dog notched out, and each end placed under a jaw. The screen must be turned up at a 90 degree angle where it clears the underside of the jaw. This keeps it from buckling when bedding the trap. Pan tension must be increased to support the additional weight of the dirt and the tension that the screen places on the pan. This system holds up very well thru snow and rainy weather and does not allow the trap bed to sink and develop into a sinkhole. The rainwater soaks thru the screen and into the ground so the dirt on top of the pan dries sooner. In reality, you can have traps still working thru snow and rain. I have bought some of this black screen from O'Gorman and am going to use it on my line this year. I have seen numerous times in the past where a coyote's foot just shaved the edge of the pan on my Bridgers causing a miss. The only trap I will not use it on probably is the MB 650 with it's huge pan and both jaws that lock down. To get the screen to lay flat, you need a medium low level pan like the MB's have...I have a tool I can adjust my Bridger pans with to the correct height but the MB's come that way from the factory. With the night-latch feature, these traps fire when the pan drops about 1/4". A low pan with medium to heavy tension is also very important for a deep foot catch if you think about it. I will be using these on my line this year. Even though it takes about 10 more seconds to install one, in my opinion it is well worth it. I do have the luxury that I am not a Long Liner.