Wow, how helpful!
This is probably the most friendly forum I've been on, and I've designed a few myself!
I will certainly check out the places you recommended Chac, and let you know how I get on.
I think you've turned me into a proper fish fanatic!
Nav, I live in Bedford (50 miles north of London), so warrington is a bit of a distance for me, but thanks anyway.
Cheers again,
Paul