Systems and techniques are disclosed for morphing a first control object in a user-interface into a second control object. The VoIP telephone comprises a network communication system for encapsulating data into IP frames for exchange with remote devices over a frame switched network. The speed square also has a closed and arced angular measurement tube extending along a portion of a circumferential arc between the non-hypotenuse sides and the tube contains a fluid and a bubble that moved through the fluid. When the carrier system is removed, the lumen contracts to a second radial state, and the inner wall of the cuff positioning device provides sufficient surface adherence to the outer surface of the catheter, so as to maintain the position of the cuff positioning device relative to the catheter, and to allow for catheter exchange. Various optimization embodiments are further disclosed.