Tamiyacowboy,
thank you for a most comprehensive post and some great info about upgrades. Once I have managed to get the thing at least stable I will move on to running just like any bloke would do! Let's forget about walking.
Luckily 'sltatts' managed to find a copy online, in about 30secs, and email it to me. Now, if only I had set Google to search 'the world' instead of just the UK then I might have saved myself looking a right numpty.