On my machine I run out of nose down trim at around 170-180 km/h. That means that I have to apply gentle forward pressure to fly faster than that. That's all. It is not a sudden pitching up or anything. Just that the trim maxes out at around that speed and so you need to maintain a bit of forward pressure.
I have consulted with the company on the matter of developing a v2 of the ArrowCopter. On the top of my list is a differential incidence horizontal stabilizer which would make it the first gyro certified with this feature after Cierva's, I believe. This would obviate the need of a laterally offset rotorhead while at the same time providing improved stability in the case of loss of rotor thrust. A few improvements could be made to further streamline the fuselage, particularly in the rear section. This would make an already slick gyro even slicker. Depending on funds available, I would also look into a new rotor design with a new airfoil because the trusted old NACA8H12 isn't the best one out there. I would also increase cabin space to accommodate more stow room. That's about it.
I am also sure that, as the Rotax 915 iS becomes available, that it will become an option for the ArrowCopter. This requires some amendement to the certification, though.
I have no idea how one could scrape the rudder with either the spur or the tailwheel installed. I certainly haven't managed and I make a point of landing touching the spur first.
Greetings, -- Chris.