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If you look at the etched 44-tonner that came out a while back, you'll see why I'm counting on resin, particularly for GE. You have compound curves at the hood edges, rooftop, nose, etc. Not well suited for engraving at all. The all-etched one looked like it was made of folded cardboard. And, on a Kato critter, it naturally wants to short out everything when the pickups are at full set.While I love Grant's F45, I think about everybody that's tried it has had the most difficulty with getting the edges and joints good between the etched roof portion and the resin body.And you really CAN'T pour resin into brass. The resin will run into places that air can hardly go. It would leak around the sheets in all directions.Now the tank casting is another matter entirely. Richie, the first test of resin sides and a cast metal center was a complete success. Photos to follow.If the only way people want this is as an all-etched model, then I'm done. This is already as much etching as I can stand, and trying to even get anybody to take it on for production may defeat it yet. The inclusion of the etched parts will easily double the cost, and it takes several days to make just one set of etchings at home. That's not particularly practical either, though its made for a great expiriment.