tier-10 second hardening tail: 0.98 -> 1.00 public, P(tier10<0.90) 1.295% -> 0.297%

Harden tier 10: 0.94 -> 0.98, overall 0.978 -> 0.982

Tier 10 = 0.94: highest_tier 9->10 (MAX), overall 0.886->0.978