Hi there, can anyone answer my question as to why my Bachmann Tornado 60163 seems to not have as much power since chipping it & why it struggles to pull a six rake of coaches, also after chipping my standard five i have the same problem and when you decrease power to a halt it suddenly lurches forward then stops again, Tornado is fitted with a 21 pin 36-554 decoder & Standard five with a 36-553 8 pin harness. Thanks for reading.