I hate plastic, especially using such a load of rubbish on a vital part, cant understand why metal wasnt used. The dealer we spoke to today said he could drill in one and put a split pin as one had failed the other day. It was only when i examined the rest when i discovered most were on their way out. Im not too keen on the split pin idea though as wont it weaken the metal as its not designed for it. The thing is all vandercraft trailers have the same plastic locks so it is a range problem, not just our trailer. A dealer worker is coming in the morning so he can inspect the problem but i believe just replacing the plastic will not solve the problem. It is very frustrating!