A boom deploy actuator with improved maintainability and simplicity has an electric motor and control circuitry for selectively powering the motor to develop torque with either rotational direction for rotating a capstan to vary the length of a boom cord extending from the capstan to a boom. The bearing plate additionally has vacuum channels which can be connected to a vacuum line and which open into the working area. The liquid material is adapted to be ejected through the plurality of nozzles of the plurality of droplet ejection heads in the form of droplets. The inlet end of the venturi tube is also positioned further from the entrance than the outlet end of the venturi tube. The filter is disposed to have a filter surface extending along a gravitational direction when the pressure sensor is used. The wallboard tape includes a fibrous paper tape having a resin-impregnated body and a water-soluble, water-activated adhesive layer applied to a surface of the body.