if you cut the main hoop in the middle , colps the cage and put it in , then reweld ,thats nother way but you loose a lot of the strength of the main hoop then ,

another way is to loose 3 or 4 inches off the bottom of the main hoop legs , this will give you room to manouver , by the time you have the missing inches welde back o , boxed in and a couple of strengheners itll be as strong as ever .