Depends on the play. If I'm doing a heel-up chip with an iron, I'll grip it like I do my putter and make a putter stroke. If I'm chipping with a wedge, standard grip.
Ooh I did that once too, when I was walking solo. The pro shop let me borrow a cart and I drove around, thankfully someone found them and was able to get them back to me.
Same. The few things I've seen recently didn't move my needle at all. When he and Finch were doing instructional stuff, it was fairly decent. But that was years ago at this point. I'm sure he moves the needle for a lot of folks based on his numbers, but it's not for me. Then again, very little...
Best lessons I ever had involved zero tech. And those lessons got me from 110-115 to low 90's pretty much immediately. I've been using those feels and baselines ever since.