"Many thanks to everyone for your comments.  Life is indeed fraught with difficulties. Neil.  You are absolutely right; it’s all guesswork and supposition, even if I used the right base figures.  Obviously I’m enchanted…"

"PS It's a well known fact that mechanical engineers can't spell."

"Hello Joe Remember this is a completely new product.  Nothiong else like it exists.  It's closes compeitors are the Leaf Blower and Pressure Washer. Population of western world ≏  260M ≏>…"

"Thanks Allen Of course, patent sales have been going on for years.  I visited your site and don't think it would be of interest to me. Thanks again PL"

"Thanks Neil, I know what a business plan is.  And it will vary depending on partner interest.  First I need someone to view the working prototype and understand the potential.  That will speak loader than a load of unsupported sales…"

"HiAfter five years development I have overcome all engineering obstacles and achieved the holy grail of a genuinely new mass-market product that will sell like hot-cakes with jam on.It's a hand-held version of the mechanical road-sweeper. …"

"Looking for specialist gearbox design.  To fit onto 550W Universal Motor 9000rpm.  Gearbox output torque = 10NM approx.  Reduction 1:50 approx.  Must be lightweight."