[tonythetarga]

One item with the turbo's and GT3's was the cooling system connections are glued together. Yes glued. They can become dislodged and will spill coolant everywhere. The fix is to have the bits welded back together. The problem is that the engine pretty much has to come out to get to all the glued connections. I don't know what that failure rate is. Probably higher in cars driven on the track and in hot locations. Your risk depends on what plans you have for the car.
There aren't too many other problems with the cars. They are fantastic machines.
Bon chance!