I know in case of Shield Slam you make a free bull rush substituting your attack roll for the combat maneuver check adding the bonuses from Improved/Greater Bull Rush.
But what about Weapon Training - Close bonus to combat maneuver checks?
for instance, attack roll for hitting:
12 - dice
+4 - strenght
+6 - BAB
+1 - Weapon Training Close bonus on attack
23 - Attacking TOTAL
while attack roll for bull rushing;
23 - Attacking TOTAL
+2 - Improv. Bull Rush
+1 - Weapon Training Close bonus on Combat Maneuver Checks
26 - Bull Rushing TOTAL
is it right?