Then record here ^^ ... hum, I suggest you mount the top down, to target boards hanging on the foot and after add the other feet (otherwise it gets stuck). Mice have only 2mn (with my three cats) but no worse, it avoids they are the twists around a leg or neck (already lived ...).
Only Downside, the screw for the upper house is "too short" impossible to aim. So I did not put any more frowned upon the size of the big cat, he could not have put it, yes there :) So it is a little extra room in the house :)