I know you are not bothered about the originality/period correctness.
That's true, but the bike still has to look 'right' and in this case I am using a fair amount of period correct components, at least above the centre line of the bike.
I use Spoon saddles because I find them really comfortable, at least on mtb's, and as all my bikes get ridden, then comfort is very important. In this particular instance, I don't think the look of the Spoon is correct for this bike, and as the Turbo is easily available and was an option when the bike was new (and is used in at least one brochure photo), I thought it would be the best option, provided it is comfortable.
As I have still got a lot of bits to find, and also as the frame is far from ready, I think I'll see what I can find on the bay over the next few weeks.
bren, that's good info, thanks.
"Try not to punch any clowns"