PIKO RDG Camelback

The scale is about 1:22.5. Sorry, I can't help with your other questions. Welcome to G gauge railroading! Hope to see you posting here at HONG!

 I wanted to help on your post, on another forum as well. I don't own this loco and have only seen it once at a show.

  I have dealt with KDs and they have a nice assortment that fits just about every app. Sometimes, I get advice from other guys on what coupler they've used. I've learned to keep an open mind. The large offset couplers that some use, will release when pulling a large train. I'm not sure you'll ever do this with the engine. I always try now to get the straight shanked couplers or the least offset, and make spacers for them that are solidly mounted and won't let the coupler dip out.

 Sorry I can't help more.

 I try to get the new "E" ones too, because you don't see the spring! I feel they look the best. I also try to body mount everything.

I agree about avoiding the Kadees with the offset shanks if possible, because the offset does tend to make the coupler pull out of alignment.

As far as the scale of the model is concerned, since the Reading was a standard gauge railroad, the correct scale to match the G gauge track (1-3/4" between the rails) should be 1:32. However, most G gauge manufacturers take wide liberties concerning scale with their products. ForRepresenting European meter gauge, 1:22.5 is close, while 1:20.3 is good for 3' gauge. For 42" gauge use 1:24. Polls used 1:29 because that is 3 times HO scale, which made it easy for them to scale up HO scale products into their large scale product line.

Bill in FtL