I can only manage more than an hour with bulk coals on that bowl. With QLs you'll prolly get about 40 mins cz heat managment sucks with those pre-shaped coals. I only use bulk coal and try to use the smallest pieces of coal (size of a peanut) but i put 4 of them scattered around the bowl.
Unfortunately i cant record decent quality video to post a video of my setup procedure at this time. i'll try to do it like a guide with pics if i dont get my hands on a camcoder.