Few things on AV 45/46.
Interesting. Same mileage (4400) on mine and it is a bot more worn out in the center (winter pounding not enough twisties action). As with the BT 010s, the wear increases in the center past mid-life (I'll get 1,000-1,500 miles before the center wear mark).
The good part is that the handling does not degrade significantly over time (quick natural steering, good feedback).
The bad part is wet traction, nothing really bad but be cautious in borderline wet conditions. Yesterday, 2nd gear 3,500 rpms cold tire bad wet road (just getting wet, fog type, clean surface), opened it hard (to see) and the rear gave way right away. Nothing really alarming for a sport touring tire type. Dry traction is never an issue.
Hugo