Mart,
The 'swashplate' is lower than normal.
From the Mosquito web site;
"Control Systems:
The control system is unique to the Mosquito. Main rotor control is achieved from the floor mounted joystick and collective through a control mixer in the base of the main mast, then through push tubes in the mast up to the base of the swash plate.
The swash plate is contained within the mast and is supported by a push tube located in the rotor shaft. Control rods on either side of the push tube transmit inputs through the rotor shaft to the control lever on top of the rotor shaft and then down to the blade pitch horns through pitch links."
Reference;
Here is Cicare's patent.
Here is Fetters patent.
Dave