@colinworth79Colin, I had to take all the gubbins out of the lower case to clean it out thoroughly. It was full of dust and black silicone. So, I put a dob of grease on the heel of the front tensioner, and offered the case up. Split the cases, and behold the pocket full of grease! Result! HAving said that, no selector forks to line up, so mightn't be such a success for real!