My shift linkage broke this morning, I bought some 6mm threaded rod to make a new one but then realized that the linkage has right hand threads and left hand threads. Any ideas how to make one with that setup? With how long Chad takes to send replacement parts I figured making my own would make more sense. Does anyone have a customer service # to check on warranty parts? Chad keeps sending me copies of his emails to scooterdepot, but I've yet to see any parts! The linkage broke because it was getting very hard to shift, any ideas what would cause the shifting to get very stiff?