A collapsible golf swing training tool employs a plurality of elliptical blades, attached to a weighted shaft, to capitalize on air resistance, to aid in developing the muscle memory and strength required for a smooth and consistent golf swing. The operator automatically detects the type of door and uses that information to set a maximum speed of door travel. The annular piston of the slave cylinder surrounds the input shaft of the transmission. Some of the functions are requests for data services at the telephone. A sealing member seals the first and second substrates in the periphery region between the display region and the light passing portion. Additional optional advantageous features are provided, including various axial and radial clearances and various sealing elements.