Did you click on the ball bungee link I posted in the answer? It will clearly show you two photos of ball bungees, one product shot and one in use:
If you re-read the portion where I briefly mention the flash meter, you will see that I say that I do not use one. I use the screen on the back of the digital camera to fine tune my exposures.
I use my experience to get my first try pretty close, so I can fine tune it with the screen on the back.
I cannot stress this enough: You need to take the time to experiment with your equipment and see what kind of light, and what quantity, your flash gives you at various distances.
I cannot construct any paragraph that will give you the knowledge that experimenting will give you.
I have been shooting photos for 30 years, 20 if which as a professional. And - even though I shoot about 500-750 assignments a year, I still experiment every single day. There is no substitute for just playing around and seeing what you get.
You just have to do it.