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Terry, I agree with you 100%. I've been paying more attention to the dynamics of the operation of the trucks reather than the car weight to length ratio. I do try to keep my car weights at about 100 grams, but I ingore the car length. The NMRA recommended practice seems too heavy to me and this becomes a problem when you want to run long trains on grades. I have found that good trucks, properly mounted, allow me to run lighter cars over less-than-perfect track. The real test is to run a 50+ car train through your most complicated trackwork - then run through it again, backwards! The best rolling trucks that I have ever seen in my 40 years in the hobby are the old Lundburgs equipped with Kadee wheelsets. Still, today's trucks make it possible to use the proper sideframe with the car you are modeling and most can be made to roll as free as the Lindburgs, but none can match the tracking properties of them. Jim
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