He now has sail assist, from this brightly-coloured parasail and a small triangular lateen. Training with the parasail has been a bit trial-and-error, as Chris says on his Facebook page:
The instructor is a bit daft at times - seems he's never done this kind of thing before and there is quite a bit of tangled lines at times and a lot of zig and zagging going on but in the end, I learn some little trick which makes the next time even more productive and fun.
Chris is blogging his exploits here. All good luck, Chris - I think you are going to need it!