Alfonzo, I like your kettle stack! If I may make a suggestion......you should strongly consider swapping out the stock legs for something beefier. When I first joined this board 16 years ago, I didn't have a WSM, and I made my own WSM-XL by using two rotisserie rings stacked on one another for a middle section. It worked pretty well, but one of the legs failed catastrophically (while I was cooking on it at a competition with old timers Rick Jones and Henry Joe Peterson) dumping hot coals and cooking meat all over. The stock legs just aren't designed to support the weight you have on there.
Pretty cool set up with the drum addition, and you have TONS of space! Nice work!
Rich