I have constructed a 2x4 cavy cage with a 1x2 loft area. My problem is the ramp! I have looked at every single picture on this site and I know what kind of ramp I am gearing towards which is like many of the ramps on here. My problem is that I can't get my grids to bend properly. They either bend at the wrong spot or I "almost" get the right and it breaks. What am I doing wrong?