I have never used a neck strap. I hold the radio and use my thumbs. If I am doing a low inverted pass I use my thumb and finger on the right hand because it is harder to get confused and pull the stick back when you meant to push it forward. I read that full scale pilots do the same thing for the same reason. Wrapping your hand around a control stick can get you killed if you pull instead of push. I read that in a book by Frank Tallman. We all know who he is, right?