Everybody's had a turn at making an APA - hence, the Doorknob.
The base malt is Traditional Ale, which seems to convert well and has slightly more colour than 2-row. Munich to give it a bit more thickness, and the flaked corn helps achieve a thick white head. The wheat is a hangover from a Cooper's Pale Ale clone recipe which has been altered time after time to create what we have now, hence the use of yeast.
The goal was to produce a fruity, fairly dry pale, with enough IBUs to make it palatable for grumpy old Australian blokes. The Topaz and El Dorado might be new to you, they bring a tangy edge which is sweetened by the accompanying Citra.
Scavange the yeast from 3-4 stubbies of Cooper's Pale Ale, grow a small starter, and let it run at 16 degrees. I've also just pitched 4 bottles worth of dregs and it's turned out fine, fermenting slowly over fourteen days. The "off flavours" this yeast produces when under stress are all fruity and nice anyway.
If your temps run high, you'll have a lot of banana smell.
Add your dry hops once fermentation is complete.