Mark, This is probably the best advice that the Geek Group has gotten. Jeff snip... > Original Poster: "Mark Finnis" <mefinnis@medicine.adelaide.edu.au> > Before you start designing rotary gaps, try raising the capital to perform > a "study of feasibility". This might mean walking into a range of offices, > including Greg and/or Bill's, putting a cheque on the table and approaching > the topic from the foundation-up, rather than the other way around.