Although this is true, a managing member must be responsible for the weapon. So where the managing member lives does matter. You are not supposed to let the gun out of your possession. You cannot just hand a machine gun to anyone and let them take it out without you. A corporate member would need to be in possession of it. So unless your bank is a member of your corporation you can not leave it there. Same goes for leaving it with a friend in Oregon. Unless they are Managing members, but then they would need to be the responsible person for it and they would need to fill out the form 4.
the ATF has always ruled that "secure storage" is a legal way to store.