I'm considering purchasing a CS-105 Command Station & UWT-50 throttle bundle... There is an option for encoder or potentiometer knob on the UWT-50 throttle. As I understand it the encoder knob rolls over and over, whereas the potentiometer knob has a hard stop at 0 speed. When you switch locos/addresses, the encoder version assumes the existing speed setting from the new loco, and lets you adjust up or down from there by rotating the knob in either direction. I'm not sure what the potentiometer version does when you switch locos/addresses. I kinda like that feature for the encoder version, but I also like having zero always being at the same knob angle on the pot version. Any preferences/reasons for favoring one version over the other?