I don't have any to hand, but I can take some and post them if my forthcoming description and pics of the drum pre-work doesn't help you (many diff types of drum out there).
Let me preface this by saying that I basically did mine the wrong way up and wish I'd done it a different way - more on that later.
The drum came to me with the axle still firmly attached.


The rivets were impossible to remove, so I had to take an angle grinder with a metal cutting disc to the other side, inside the drum, where I could cut right through them.

With that done, my approach was to cut some 1" holes in the bottom with a holesaw to allow ash to fall through and allow extra airflow from below, and attach some 2.5" bolts to the bottom as feet, finally add a chain to the top so I can lift it in and out using my axe as a hook.
All well and good, except I should have built it the other way up (thanks Simon aka Captain Hindsight!). If I had used the open end as the bottom, I could have attached a small barbecue grill (I have four lying around) using "liquid metal" or even just some twisted wire, and this would have been my ash dropping, airflow enhancing bottom. Then I would have cut the other end clean off with the angle grinder.
As well as the advantage of not wearing out 2 holesaws (I couldnt get SS rated holesaws for love nor money, but now my local shop stocks them!), I wouldn't have that lip round the top which catches meat drippings and is generally quite disgusting and a pita to get clean.
With that said, I'm still really glad I went with the wm drum firebasket. Bloke in the shop wanted a fiver for it which was fair to say he spent ten minutes dismantling all the plastic crap off it for me. Works excellently as a firebin on a cold night and is a high capacity firebox for the smoker.