If your sausages are thin, and your grates are wide, and you are afraid you sausages might fall through, put aluminum foil over the grate and slice venting holes between the grates. This will allow the smoke and heat to penetrate, but keep the sausage from falling. You can also use a grill grid for this. If you use the off-set firebox style smoker, you may want to rotate your sausages halfway through cooking, as the sausages closer to the firebox will cook faster than those further from the firebox. That’s what I did in the pictures above, where you can see the more cooked sausages have already been moved away from the hottest part of the smoker.