i am with vaughn on this to nice to trash,, but i think i would cut out a strip from the sled now and put in new insert that when it gets worn out can be replaced with a couple screws. are your runners glued as well? if so then the sled needs to realigned with the back fence which could be cut off from the sled and reattached with screws not glue and have a screw at one end of it slotted for adjustment then the next ones can anchor it in position.. when i saw cut off the back fence i am referring to this being stood up on end to just cut the fence of not the base.
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