Failed fitting pieced back together with epoxy putty

The plastic retainer on which the forward end of the awning roller rests is a weak design. After ours fractured, I built up epoxy putty around it, forming the mass around a AA sized battery. After hardening, the putty can be shaped and then drilled for the safety pin that bridges the top of the U-shaped retainer but is worthless when the retainer itself comes apart.