The carb went on fine...along with the electrical re-connections etc....but that frayed throttle cable was a bugger, so I rang Ben, thinking that maybe if it needed a new cable, I ought to bite the bullet and get a foot throttle fitted too...and as I'd be asking Ben to fit them, he'd set up my idle power setting properly for me too.
Ben was delighted to hear that I had been so daft as to remove the brass thingy on the end of the cable, saying, "This is all a bit beyond you really, isn't it" :) Apparently, he insists, I could have removed the throttle without undoing the brass thingy.
So, I am taking the trike to him tomorrow and picking it up again next Friday, at the start of half term.....solving a bunch of problems. At the end of this crisis, as was the case at the end of the last lay-up, I shall be left with an aircraft which is better than before. It has been odd flying on a hand throttle alone...especially when landing. I think a foot throttle will give me far better control - it is a nice little design too.
p.s. Thinking it through, I can see now exactly how I should have taken the brass thingy out without undoing it. It is just the same as dismantling bicycle brakes. What a numpty! (I feel embarrassed)