The 17F's I got for the Countach are not drivable. I don't know if it's because they are missing the special peg, or if the inside of the rim is too close to the knuckle and something seems to be catching. Rear 18's are perfect. So, when driving the Countach, I have to swap back to the stock wheels.
Hopefully other 17's won't have same issue, although they told me that they were too small to mill out that peg.
I've suggested to them two more styles and hopefully we'll see more options coming soon!