Hi there everyone. I am looking to upgrade my flash soon from the 320EX to the 600EX-RT. I mostly use my flash for concert photography, but having got the 100-400L II for myself, I've recently been doing a lot of wildlife. I am just curious as to what everyone thinks about the Better Beamer, because it seems that is almost a must have accessory for birding and wildlife. I shoot with a 5D Mark III if it makes any bit of difference. Thank you in advance.