Just spoke to my mate who's director at PPG and he said not to bother with Quaiff as there not all that strong, apparently ppg are fitting boxes to cars running 8 second quarters but the problem is the cost. He recons it's almost pointless only fitting 3rd and 4 the as the rest of the box will just fall around them which makes sense I suppose. He even offered me a gear set at cost but it would still be twice what the car cost, and that's before you start with about £200 for gear oil. He said one of the main problems people have is they expect to change gear oil every 4 yrs and the box be fine which I know can be true on some cars, so maybe he's right on good oil and regular maintenance we will see