Yes, Doodledog, I plan to continue the body to the top with the sleeves attached.
I have actually done what I'm trying to do now once before, with a different pattern, but can't remember now how I dealt with the sleeves, though I remember that it turned out OK.
I definitely worked both sleeves bottom up, though, as per the pattern as far as the armhole shapings, somehow then adding them to the needle containing the body knitted up to the same level, before continuing to the top with the sleeves attached.
I've done top-down occasionally, but only following a pattern written that way.
The pattern I am using this time is a traditional one, with the pieces worked indivudually bottom-up, so I really dont want to try to do it top-down.
I've not got off to a good start. I started with a sleevethus afternoon, to get used to the stitch pattern, but I'm not happy with my tension. I'm carrying yarns across the back between different colour blocks, and have just noticed that I've gone from too loose to too tight. I'll have to start again.