Hello friends,
I would like to make a suggestion here. When putting the gear lever from up to off, take the handle out of it's detent, slide it down slightly, release it, then slide it down until it slots into the off detent. This way, it will not go past the off detent. We were taught to do that when we were cadets doing conversion training on the B737 simulator years back and so far it has worked well.
Happy flying.