@hdiamondphoto’s Twitter feed made me aware of this little gem. Cool idea. You wouldn’t always need it, but when you did, I can see it being a life saver.
Be warned: I love Viewfactor’s gear, but in my experience, they have a hard time making their shipping timelines for some of their products. But the page says “In stock”, so hopefully you’ll have no delays if this device solves problems for you.