Thanks David, that is very informative, I have the Loco body sitting in front of me and it is extremely 'nose heavy'. To quote 'Ian Rice', "what counts is sufficient weight is acting in the right places.....as long as the weight is effectively borne by the driven axles, it doesn't necessarily have to be located above them." In a 4-4-0, as Mayner suggests, the trick is to balance the front by a weight in the Tender. In this model the Tender does not have additional weight and all the wheels are fixed.
I'm about to wire the Loco with a 8 pin socket but will have to wait until a decoder arrives(hopefully) early in the week. I will report back on my findings.