I had this kit laying around and thought I would upgrade it. I didn't realize thow the quality of the ring have gone down hill. Cheap card stock that is out of form and a rubber band shock cord. Yeah it's been awhile for me building one of these kits. Anyway the Big Daddy is deserving of a decent motor. I wanted to go with 3" LOC rings, but all that I see they come with is 29mm which is fine, but will the rings fit the Estes body tub? I checked the rings on hobbylinc but should look on the LOC site