Has anyone here converted the coupler on their VL Big Boy? Lionel sends a mount with screws but I don’t see where those screwed would go. Plus there are larger screws that fall into a similar location to where I assume these would go. These large screws would swallow the mount screws. I have recent models that are far easier to convert. I assume I will have to drill into the frame to convert? But not sure it’s even possible give then existing holes. Any help is greatly appreciated.