I've being using a holdall for as long as I've been in to fpv, it wasn't the best as I had to carry my bag then balance and hold the quads when Id left the car to the spot I was gonna fly. So I thought I use a military style bag for work and with the straps it would be great fpv bag, so using those free battery straps I've got I hooked them up and it works well plus 30 quid from amazon. It can fit a tx16s in its foam case in, fat shark attitude v6 incase, fire bag with 14lipos, tools and extra props for every quad I'm taking out. I've only attached two quads but I could easy add another 2 to either side