I kept the original ramp, and I just added the new loft right above the lower platform of the ramp. The lower platform rises 1/2 of a grid from the coroplast bottom, and the new loft rises 1/2 grid above that. The piggies hop this distance quite easily. If they eventually cannot jump this distance, I can use the other side of the loft (nearest the camera) and put a ramp directly to the loft. For now, though, they are enjoying it. I cut the coroplast edge off in the area where they are jumping up into the new upper level, just as it is cut off where the ramp meets the old one.