My new K27 ( Fitted with Plow ) seems to have a problem when negotiating turns and switches. The front pilot de-rails or "leaps" off the rails. The problem seems to be not enough weight over the pilot truck. I have added a plastic shim to the plate which the plunger runs against and this as reduced the problem but not fully rectified it. To help we have just about relaid three quarters of the railroad, making smoother curves, filing the switches etc all have helped but still not cured. To say I am disapointed in this loco is an understatement. My LGB Sumpter Valley / Aristo Dash 9 and Malletts have no problems on this track, only the K27, any suggestions

Andrew