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Product Description
The Walthers Comet II cars are a blend of details from the Comet commuter cars and Amtrak Horizon cars. This part gives you an easy way to replace the Horizon-style 4-tread steps with correct Comet-style 3-tread steps. One sprue will complete two cars. For best results, this should be printed in frosted ultra detail.
To install, you will need to cut out the bottom 3 steps on the original Walthers step wells, and the replacement part should slip in with almost no trimming. I used a razor saw to cut on either side, and scored across the back of the third step with a knife to break out the bottom 3 steps. Don't cut out the top step or you will lose the two screws that hold the couplers in. I glued the parts in with CA (super glue).
Each sprue includes enough parts for 2 cars.
By the way, if you like the looks of the replacement trucks I used, an updated version is for sale at https://www.shapeways.com/product/48F6AC7SZ/ho-gsi-general-70-commuter-trucks?optionId=57731291