My Anniversary Loco has developed what appears to be a intermitant wheel squeek when it goes around curves and only on the curves. I have both 8 foot diameter and 5 foot diameter curve radius's so i dont believe thats the issue. I have checked the pilot set and they appear to be ok but i have noticed about .1" of side movement on the front drive set and am wondering if this could be the issue. Would appreciate any info form the knowledge base here. 

thanks
matt

I am establishing a new line for my backyard layout and have a 300" run in a straight line and am trying to calculate maximum amount of rise i can accomodate at about 2% grade, is it appropriate to use scale inches (approx. 680 scale inches) to calculate the max rise or actual inches (300") and still be able to pull the grade without issues. Any help is appreciated..
thanks
matt