I just got a new sm20. The woodbox now is above the floor of the cooker. My question is there are several references that say, "be sure you slide the woodbox all the way in" or "woodbox must touch the rear of the cooker". My firebox on slides until it is flush with the front of the brackets that it slides in on. There is a slot in the front and the back, the rear is a larger slot (allows the woodbox to slide over the bracket) but the front slot is too narrow to allow the box to slide all the way through. I know this is a new design .... any ideas? Is this right or should the front slot be bigger? I'll call CS on Monday, but in the mean time ???