Reply to "Calculating overhang on MTH Premier articulated locomotives"

Thanks for your reply Bobby!!  

I had bought a Premier MTH Challenger but the boiler over could not negotiate the tunnel portal wall on O72+ curve.  I had to sell the train.  I would like to run other Premier articulated engines but am very apprehensive to purchase another.  I may have to stick to Imperial models on the articulated locos.  My Premier Q2 4-4-6-4 can negotiate the curve fine.  I figure that most fixed wheel steam engines will fit if the Q2 fits!!  I was hoping there was a way to determine the overhang prior to purchasing a Premier articulated model without going to the dealer to measure.