Hi based on my experience with my own Super3 the squealing is caused by insufficient tension in the belt, I would keep the wheel alignment as set by the dealer/factory ie both adjusters measure the same amount out The belt needs to have 8mm to 10mm up and down movement in the centre of run or a max of 45 degree twist by hand, so fairly tight Reading about these belts lubrication is not recommended. This adjustment can be done at home if you are happy with doing DIY car maintainence and have the particular tools needed
