An example power supply includes an energy transfer element, a switch, and a controller. The apparatus generally comprises actuatable jaw segments and a base from which the jaw segments extend, a collar within which a portion of the base is seated with the jaw segments operatively engageable with a portion of the collar in furtherance being drawn together upon actuation. These RDCs are then permuted into combinations of RDCs and each composite RDC is cached rendered relative to each other in a bounding box of sufficient size to adequately contain the combination. The instrumented golf club system allows a golfer to receive feedback in real time while playing golf. Data packets may then be transmitted through a second VPN tunnel in which a first end of the second VPN tunnel is terminated by the first data processing system using the third network address and a second end of the second VPN tunnel is terminated by the second data processing system using the fourth network address.