Only the November-December 1982 Prototype Modeler is available on Trainlife at this time.
http://magazine.trainlife.com/ptm_1982_11/
 
The article begins on page 12.
 
Eric Hansmann
Murfreesboro, TN

Ben Hom wrote:
 

This kitbash was inspired by one written up by Richard Hendrickson in Prototype Modeler - I'm having issues with the Model Train Magazine Index on my work computer, but IIRC Richard wrote up other conversions using this model in Prototype Modeler.

 
     Two very nice articles, creating a whole bunch of interesting gondolas. They were in the September-October and the November-December issues of PM in 1982. I built a couple of them myself.
 
Tony Thompson