Thanks for the reply BB!

I had all sorts of trouble removing the key from the rear roller shaft. Had to get hubby out to help me with that one. I had a bit of a play with the handlebars and ran over them with some alfoil and water. They may not need re-chroming after all!

Will take your advice re the length of the gussets. I can imagine the stress those 20inch rails must deal with!

In terms of the vulcanised rubber, I think I may be able to get away with it. I've got blue couch which mows a bit higher than green. Do you think that would be okay? I will probably maintain it once a week so don't think I could mow it too low anyway.