I spoke too soon. It turns out I’d turned the bevel modifier off in the view. When I turned it on the huge additional offshoot of the console body reappeared. That bevel modifier has been a constant source of problems. I imagine it works fine for models made of quads, but it’s just too much work too try to tame it with n-gons. Simply leaving the beveling until later and then applying it where needed looks like a far better option for a model like the one presented in these videos.
