A few years ago, I bought a White Pass & Yukon Big Haulers set in G scale. Last year, I bought a Durango & Silverton set in both HO and N scale. The power transformers appear to me to be identical. My question to The Bach Man is, am I able to use these power transformers interchangably? I am asking because I have a permant G scale layout in my basement Train Room, but like to do a temporary loop around the Christmas tree. I would be easier for me to use the power source from the HO or N scale set rather than swiping the one from the permanent G scale layout. Thanks in advance!  Jim