An excellent model, good detail, accurate to prototype
There is a single issue... chassis center sill is too wide (9mm.) Because modelling The Newfoundland Railway/Canadian National requires the truck wheel width to be reduced by a scale 14 inches, if the sill is wider than 7mm. there is insufficient room for the truck to swivel, given we wish to negotiate a 24 inch radius curve. (It is a simple fix by removing a mm. of material from each side of the sill at the point of contact with the wheel). I have been a personal friend of Andrew Baird for about 35 years and I have conveyed to him this issue. He has communicated to me that he will modify the CAD to correct this.