Devices, systems and methods are provided where a request may be transmitted based on a first encoding scheme, and a response to the request may be transmitted based on a second encoding scheme different from the first encoding scheme. The catheter may be straightened for insertion into a patient, wherein the catheter is allowed to resume its coiled shape. The puller device has a pair of drive axles mounted on a gap-setting device, such as a scissor jack or its equivalent. When colors are changed, the residual coating material present in said voltage divider 16 can be moved into the empty insulating section 25, after which it is forced by means of slugs back through the entire supply line 7 to the color changer 1, and is thus reclaimed.