Dave,
The intermesh may have one of the safest records and other advantages but it still probably would be a hard sell. If I was in the logging business I would consider the K-max, just dont think I would consider the configuration for sport. But I will do some study.
Cran has advised me that low disc loading increases the likely onset of vortex ring state.(normal descent rate is closer to vrs with low disc loading)
So my conclusion is low disc loading may help but in the case of a power loss at 50ft some other type of safety device would be needed, perhaps an airbag. Or muliple engines.
slowrotor