Thanks for all the help, just about what I was doing, high gear - brake on and chocked the front wheels. Any sizes of the tool would help as I could knock one up, the amount of time I have spent in the engine bay in the last month is unbelievable and may be at it again in the morning if my new crank shaft seal turns up. Hope after that I will be clear for a good while but the tool would still be handy. When ye need one ye need one.