Hey all i haven't play tested this idea much yet put i think pillboxes and bunkers should be immune to concussive firpower. instead you should be able to reduce them through tank vs vehicle firepower. ie: after the Sherman attacks a pillbox and the pillbox defends if there are any success remaining subtract them from the pillboxes defense immeaditely and mark the new number with a token. so lets say after a fire combat resultion you have 2 success remaining the pillbox now rolls 4 dice for defense of the occupants.
let me know what you think. this isn't official of course but it should add some realism to these structures
BJaffe01