The 1" reamer arrived two days ago. I followed the advice here and took a bit of the edge off the reamer using well worn wet & dry (virtually smooth). Wound in very easily and used a spanner on the end to take a very light cut (almost nothing came out). Have rubbed down the sleeve OD with wet & dry to get push fit (took two days!). Lapped in the pump plunger with metal polish so it's free. Am about to assemble.