Theres a set of wipers tucked away at the back... real bugger to get to. I can see them when the whole workings are taken out... these are filthy and more than likely misadjusted.... this is the last place to look for incorrect records being chosen. I pretty much have to pull every gear out etc to get to them and im not looking forward to the job.
if symptoms persist after this then im buggered as to what the fault could be... but once this is done, then absolutely everything has been realigned