Scott,
Thank you. Your post helps a lot, especially the picture, and it sounds like you have been there and fixed it. I bought this trailer from my father, who travelled a lot, but didn't get much use out of this one. It is a nice set-up, except that I can't find where mice are getting in - above or below. Would the slide go out if the shear pin were broken? It moves, just won't come all the way in before the "ratchet" activates. Going under the rig doesn't help. The entire mechanism appears to be above the floor (I can see about half of this floor area from the storage compartment, and the rest is in the raised area toward the hitch pin). So access must be in a space beneath the bottom of the storage compartment that is under the mattress. Now that I have some idea of what is involved, I will look when the trailer returns to its parking place on the ranch. Thanks again.
JRMunn