Не знаю как тут но на х1 где я раньше играл были вот такие шансы на заточку:
Уровень улучшения .. Файтерское оружие и броня ....................... Цельная броня
+3 ............................................. 100,00% ............................................. 100,00%
+4 ............................................. 66,67% ............................................. 100,00%
+5 ............................................. 44,44% ............................................. 66,67%
+6 ............................................. 29,63% ............................................. 44,44%
+7 ............................................. 19,75% ............................................. 29,63%
+8 ............................................. 13,17% ............................................. 19,75%
+9 ............................................. 8,78% ............................................. 13,17%
+10 ............................................. 5,85% ............................................. 8,78%
+11 ............................................. 3,90% ............................................. 5,85%
+12 ............................................. 2,60% ............................................. 3,90%
+13 ............................................. 1,73% ............................................. 2,60%
+14 ............................................. 1,16% ............................................. 1,73%
+15 ............................................. 0,77% ............................................. 1,16%
+16 ............................................. 0,51% ............................................. 0,77%
+17 ............................................. 0,34% ............................................. 0,51%
+18 ............................................. 0,23% ............................................. 0,34%
+19 ............................................. 0,15% ............................................. 0,23%
+20 ............................................. 0,10% ............................................. 0,15%