My god what an evening I put in. I bought some Shimano Ultegra 6620's today to stick on my giant SCR3, simple enough swap I thought. How wrong was I. Started off ok and took about 5 minutes to get off the first pedal, but I have literally been sat in the garage beating the crap out of the other pedal with a hammer, it was stuck fast. My neighbour must think I am a total nutter as I have been shouting like a lunatic at the bike. Fortunately just as I was about to give up the pedal came loose. Going to get some grease tomorrow and make sure there is plenty on this time.