Hmmm: I chased this problem around for a good few meetings until I realised what was going on. The problem with being pedantic is that sometimes you can spend more time tring to fix problems that may not actually be a problem. Now I realise the issue... I buy Associated T-bars.
Another way is to use a straight edge along the rear wheel rims projecting forward to the outer limit of the front axle. This method assumes you have 100% correctly centred your rear axle on the Pod. If the rear track is centred on the pod you should be able to "eyeball" the same gap between the rule and the front axle when projecting forwards on the left and right sides.