Same way I've been doing it... forever. I use 1 Weber charcoal holder.
Did a 4 lb. butt yesterday on my SS Performer in 7 hrs using this method.
Made excellent pulled pork for a buddy of mine.
New Braunfels Hondo Offset
New Braunfels Bandera (Refurbished, Modified & Improved)
32 year old Char-Broil 450
1996 Blue Weber SS Performer
2003 Black Weber SS Performer
Weber 22.5 OTS converted to OTG with rotisserie & Smokenator
Weber SJS & modified stock pot Mini-WSM
STOK Island gasser