Step 1: What you will need.
a lighter or matches
a small candle or tea light
sharp nail cutters
a pack of needles
Step 2: Remove the preload adjuster.
Step 3: WHATS THE PROBLEM!?!?!?
i had to find a way to substitute for the broken wings on the slider so what you have to do is light a candle, take a needle out of the packet and heat the end of the needle up whilst holding it safely at the end of the pliers, when it gets red hot stab the needle through the slot and it should melt into the place where the wings of the slider once were.
you should only have to put a needle in one side of the slider but if you want it to be extra strong you can put one in each side but only one in one side should do.