Sandy, I guess I thought the rules we broke were many:
First, make a roux with only some of the fat (bucky's wife would approve) We didn't do that.
Don't re-roux. We did. Coupla times (see beurre manie above).
Make turkey stock. We didn't.
Use all giblets except the liver for making stock. I just boiled up the neckbone and threw the rest out, to the consternation of BIL, who wanted to give them to the dog.
One burner was teeny and the other was about right. We shoulda used the other side of the stovetop.
Season. I don't think we did this either.
All I can say is we had beaucoup deelish gravy and I'm still kicking myself for not bringing some home.
I will however try the cornstarch idea in the near future.
Kool Aid - Think before you drink.