Im going to replace couplers,,some of the stock has ez mate,and  some the older type plastic coupler,shoud I  use ez mate or go to ez mate mark 2 aned what is the difference

what is the best way to clean the wheels on a diesel  loco

thanks for the info

can ez mate couplers be used with ez mate mark 2 couplers

does bachman ez track make a terminal track with contacts that can be wired with regular wire instead of the terminal  that is provided with the train sets ?