Do watch the video if you've not tried this type of heel before. It is very good and I'm not going to repeat Cat Bordhi's instructions here.
But, because I don't like to do the heels 2/3 - 1/3 (as Cat suggests) - I don't like how this messes with my stitch patterns, and it is much harder to do 2AAT because of the planning involved - I will do them over 1/2 my sock sts. In this way, 2AAT is possible, and it's dirt-simple to keep track of the fancy patterns you pick for the top and leg of your sock.
But, because I know the resultant heel will be too tight over my instep, I will adapt them to my "afterthought heel with gussets".
To execute, I do my usual "improved" afterthought heel, right to the point where I've completed both short-row gussets in the "corners" of the heel slit. There are absolutely no changes up to this point - I've even put the heel in the same place as per usual (which I like, because I don't need to do any measuring - just fitting!).
[you can see the little gusset and the sweet-tomato-wedges]
[reposition sts. You will be knitting the heel on the needle closest to you in this photo, towards the sole of the foot]