Thanks very much to everyone for all their helpful suggestions. I really appreciate it, and have passed it on to the Singer.
Sometimes this forum gets criticised because there's a lot of sniping and bickering, and to be honest, there probably is. My personal experince, however, is that the Mudcat 'community' are very generous when it comes to help and advice. Thanks Kendall, Katlaughing, Maryrrf, Mad Jock and Bill the Sound!
I'm really looking forward to this one - I've not been up there for years.
Thanks again, Trev