This is the 2nd real flying session with this machine.
First hover action was 2006. Due to electronic stabilization system, it is now easy to control the machine.
The odd number of cells (9s LiPo) is because the gearing was setup for the capability of LiPo's in 2005. They gave only some 3.2 V/cell under load and 10s was needed.
When I changed for better LiPo the voltage under load increased to 3,6 V/cell and I choose to cut out one cell instead of change gearing.