I just never had problems with those c-clips on the mayhem
they are real tight fit and don't get off, they don't move on the suspensionpins either
there just there to secure
they don't cost a fortune if you want to put new ones to be sure
I don't know any conversion that would work....

the outside c-clips
you can easly convert to scews holding the pins, make a hole for a small screw besides the pins
xb8 like