I purchased the replacement part from Appliance Parts Pros. After it arrived I chatted with the representative who was able to provide me with a youtube video of an engineer replacing the drum of the exact model of Whirlpool dryer that I own. The video broke the repair down into easy steps. The engineer worked rapidly explaining what he was doing clearly as he did it. The video time was 16 minutes but I think I accomplished the repair in about 45 minutes including pauses and reruns. Thanks guys!