Hey guys. Ive just got hold of a pair of these echo forged cranks second hand and Ive put the freewheel on but theres still a gap inbetween them. I went to investigate on tarty bikes and there is supposed to be a spacer provided but i didn't get one with mine second hand. Do i really need it? If the guy i bought it off doesn't have the spacer anymore what could i use instead to bodge it? not a new bash ring, just cant afford it right now! thanks, Carl