I received a sound equipped Bachmann class 37 recently. The model is so heavy compared to Bachmann's 25 and Heljen's 33. The little loco's travel well around the layout, smooth, no stutter, quiet etc. The new 37 stops on some of the points when travelling in the diverging direction. The points are Peco medium insulfrogs. I think the little contact on the moving blades is breaking contact with the fixed rail. Any comments or suggestions to solve the problem ?