They are a really well made trap. I have half a dozen to use for wolves, unfortunately I haven't caught a wolf in one yet. More trap than needed for beaver in my opinion and I wouldn't use them for beaver personally. They'll hold any beaver they grab, but I want a trap I can set over my knee when I'm standing knee deep in water in hip boots setting beaver traps. My preferred beaver trap is a Blake and Lamb or a Victor #4. Newhouses are five times the trap but they are a real pain to set over your knee because they won't break over like a B&L or Victor; plus who wants to set a Newhouse these days and risk it getting stolen? The SC 4 1/2 is built on the Newhouse design, thus its difficulty to set, plus the really stout, short springs. The SC 5 I can set over my knee just as easy as a Victor #4, but in my opinion it isn't half the trap of the 4 1/2 and costs 3 times the price.
Somebody stated they cut one end of the frame off so the springs would cam over? Any disadvantages to this? Maybe I'm slow so I never thought of doing that. All mine are in the ground right now so I can't look at one, but would there be any possible weakening or disadvantage if you cut the ends of the frame off that prevent the spring from breaking over? I think I would be able to break them over my knee then and set them by hand, which would be a huge advantage both for setting them and for releasing any nontarget catches (I'm dreading the day I have to release a cougar out of one of these, especially since I generally run the line by myself, or occasionally with the wife).