Well you know my thoughts on this as I've got a gutter keeper and that was after looking into the Omnivac. The gutter keepers 3" tubing is twice that of the Omnipole machine and the suction (cfm) is far greater. It's also a petrol machine as opposed to electric so it can go almost anywhere
The information you supplied is completly incorrect.
The Omnvac hose is 50mm which is the optimum width to fit into UK gutters 3" is not 100 MM .
The Omnivac is designed to also be used to clean beams and ceilings internally obviously this cannot be carried out with a petrol machine
The Omnivac is available in 240 or 110 volt so can be used on sites in and tunnels etc, where a petrol machine could not be used.
The Omnivac can be and is used from MEWPS (Cherry pickers) in some cases using the MEWPS 110 volt take off