i have one right at the top of drum. 1" down from top. then about 3" down from that another. this allows for a full rack of thin items like abt's. then 6" down from that another for roasts and such. if im doing all large items i can simple remove the abt rack. thats why i did the one close below. abts always take up so much room so i gave tham there own story.
on the wire wheel. i used an aggressive one from wal mart. lookd like this. made the drum shine it worked great. down to bare steel.
bottom is after rubbing on cooking oil prior to seasoning. you can see how clean the cup wheel got it. mine was the AGRESSIVE removal one.