I would also ream out the 1/8th holes in the spur gear with a 1/8th reamer and clean the spur gear teeth and face in soapy water with a toothbrush before reassembly
thanks for the tipes.. i also super glue the rears to reduce chuncking. seems to help .. can't afford to true them down to 44 mm need to get the max wear out of the . but i do true them a little out of the box to be sure they match .. and re-true them before the next meeting ..