[CanAutM3]

I'll simply re-iterate what other have already mentioned.

First, the PSS are simply inadequate for sustained dry track use. They will just melt and chunk away on the softer outer portion of the tread when good heat is put into them. Your pictures mirror my own personal experience with the PSS on a dry track. They are however fantastic wet track tires.

Second, if you intend to track more regularly (4+ track days per year), it might be worthwhile considering camber plates. The cost of the plates will pay for themselves in tire wear after 6 to 8 rack days. Camber plates become essential if you move to R-compound tires. R-comps need decent camber to operate optimally and you could end-up destroying them even faster than the PSS without proper camber.