Uses existing UM2 feeder parts. Additionally: Ball joint http://www.rcmodeltrucks.co.uk/store/rc4wd-mini-m3-rod-end-with-steel-ball-1-z-s0429.html 4mm eyelets (search eBay) 3mm Wingnuts (optional) 3mm studding Edit: The ball joint is part: S0429 if you need to source elsewhere.. I also used these - an excellent (replacement) source for bowden collets: http://www.amazon.co.uk/dp/B006PF1RBK/ref=pe_385721_37986871_TE_item