A double-ended wrench is described having an elongated handle formed substantially nontwisted extending in a longitudinal direction, a first wrench head positioned at one end of the wrench and a second wrench head positioned at the other end thereof. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The computing system may identify one or more second users based on one or more notification rules, where each second user is associated with a mobile-client system having a second location within a threshold distance of the first location. Water is dispensed into the pod and drained through a drain in the pod holder. Two or more robotic systems each having master controls and slave manipulators may be coupled to enable cooperative surgery between two or more operators.