need help w/ bumper fastner designs

[lopz056]

Hey, I have been in charge of the design and build of the bumpers for the past few years and last year my design worked fairly well but had difficulty in the process of trying to take them off quickly in order for the pit crew to get to the insides of the robot. Im pretty sure i have a decent design this year but i know there are many more experienced people out there that have lots of good ideas and was hoping i could get some suggestions just so i have choices to go through. anything would be much appreciated