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Hello all, I recently acquired some F89J flatcars.  They all seem to have a slight bow up in the middle.  The Accurail ones I have seen also have this slight bow.   I am assuming this is normal/prototypical. What isn't normal is the wheels contact the underside of the flatcar intermittantly.  This is fine until the paint wears off, then it wont be.   I decided that the best course would be to install red Kadee fiber washers.  Problem:  Kadee fiber washers have an ID of .125"  Bolster OD is .155"    Solution: using sergent reaming tool (just happens to be .155" max OD) ream out the Kadee fiber washers. Questions: 1. Is there a better way (a fiber washer with the appropriate ID)? 2. Will the wheels eventually rub the paint off the center sill of the car and cause a short on curves? 3. If anyone else has done this, how many shims did you add? 4. Have you had issues with the truck screw working its way out?  I was considering adding some Loctite to the screw once I determined the correct shim stack thickness.
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