I noted in a previous topic a comment with regard to needing an extra long allen/hex key for the crankshaft bolt. B&Q have in stock a 9 key imperial extra long key set in Cr-V. from MAC allister. The largest size is 3/8" and more than long enough with the elbow cut off to fit a socket and torque wrench. They are currently on clearance offer for £4-88. My local store had imperial and metric all mixed up on the board so search carefully!!!