I recently purchased a Williams O27 Hudson item no. 40101. I am currently running the train with an old Lionel 275 watt ZW transformer with only the whistle button.Several people have told me I can make a switch,I believe using a double pole switch.I am aware Lionel makes a sound switch (6-5906),however I would prefer to build one using 16 gage wire instead of the thinner wire Lionel uses.When running my post war Lionel Engines with the thinner wire the engine slows down considerably when activating the whistle.This doesn't happen with the 16 gage wire.Any help would be appreciated.Thanks                                                                                                                                               jac