<span class="Apple-style-span" style="font-family: Verdana, Tahoma, Helvetica, sans-serif; font-size: 11px; font-weight: bold; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">50H03-21part # for connecting shaft
</span><span class="Apple-style-span" style="font-family: Verdana, Tahoma, Helvetica, sans-serif; font-size: 11px; font-weight: bold; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">50H03-38part # for connecting linkages
</span><span class="Apple-style-span" style="font-family: Verdana, Tahoma, Helvetica, sans-serif; font-size: 11px; font-weight: bold; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">50H03-18part # for fixing patch
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the connecting shaft and fixing patch is what came ruined from the factory, then the stock linkages did not fit the metal head replacement upgrade so they required drilling. However the fixing patch and therefore main connecting shaft is what came ruined out of the box. I'm not quite sure which order number you want now? As I have already given you the order number for the helicopter itself from xheli