Thanks John,
That was very interesting news

. I definitely want to avoid using a step ladder or footstool where possible. I'm 6' foot tall, so something like Geoff's 15" f4.8 seems ideal.
I've been getting some prices from Mark Sutching for a 14-15", but might even ask about an 16-18" now. Mark advises he orders blanks twice a yr and wont know the definite prices until May-June.
I'll be giving Peter Read a call in the next few days ans once I know the ~ cost, I'll hopefully have my decision made

.
Clear Skies Norm.