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Since this discussion sort of took over the C18 thread, lets move it here. While I love the lower gear ratio of the Accucraft Shays, the single eccentric per cylinder is a huge put off. Thats not how real Shays are and with all the waggly bits out front and center, the full Stephenson valve gear is what they need. I love the prototype for the upcoming new 2 cylinder model, but once again Channing is taking the cop out way and putting the same single eccentric and reversion valve instead of proper Stephenson motion, which would take that model to the next level. We know Accucraft can make that type of valve gear and has on past models. Simulated is fine when its out of sight between the locomotive frame, but out in the open like a Shay, it really needs to have full valve gear. Only way to get that is to buy a Catatonk or Aster(with its higher speed gearing). If I could merge the lower speed gearing of the current Accucraft Shays with my old Aster Shay's beautiful 3 cylinder engine...... Maybe one day Channing will finally give us a Shay with proper valve gear, till then my wallet is staying in my pocket.