My pump is a piston pump and to date the hulls I have pulled have been just big enough ( F16 ) to have just enough air leaks that I could leave them running. But I have to layup 2 carbon ski bikes which at this time of year I get hooked into and the moulds are quite small volume with very good edges to seal onto, hence the question.

Phill, yes I did buy a set of plans but work has been so continuos that I have not had a chance to start. Maybe this year.