i think it is worth remebering that being involved in a race team doesnt mean that a product is any good (for any manufacturer)
Dont forget alot if manufacturers PAY for their products to be used by some teams and others are supported and subsidised so the a/m scene sees and buys them
The skill is either knowing by experience which is good (which most of us cant do) or alternatively checking out which manufacturers WIN the series repeatedly and dotn always offer the products free to race teams