LOL, this is like a circus
Anyway.. Its easy to see Glyn has gone and researched into various methods, and found industrial wet and dry vacuums the way to do it. He has obviously sourced a well made machine from a reputable supplier with warranties to match. Good stuff!
From what i can see, the main "inventions" are the tools and the little things that make it better than just a normal wet and dry vacuum, such as the gutter spike, the use of the pro pole to use as a suction pole, and the inlet (to the cylinder drum) to provide a vortex while still maintaining good flow into the cylinder. Im sure there are hundreds of extras added which we dont know about.
Im sure thousands (ten and perhaps even hundreds of) of pounds have gone into research and patents regarding the best use of tooling, and production of these. From this i can understand why there is a mark up on the other products such as a generator to make back from what has been shelled out in research, and patents on those other products, and why not your in business afterall.
Also by paying more you get sound advice from someone that has been there and done it, in effect in the start was itself a diy product! Just like all inventions and subsequent uses of products are.
Your also paying more to have back to base warranties, which in itself is worth alot to those that are running big businesses like Kevin, who want replacement machines asap if anything happens.
Ive got to say thank you to Kevin R for his insights into using his omnivac - If it wasn't for him, i probably wouldn;t have even thought of getting a gutter vac in the first place. As ive said before im trying a diy machine out, because i dont want to pay out for a machine i might not use all that often! If i do, and i enjoy using it, i will be in a position to phone Glyn or one of his fine friends at Omni, to purchase a vac system - and you know what, i would have more experience on how to use it because ive tried and tested my own.