All these new poles,hot systems to name a couple of things that have changed the way we work yet a good brush is like looking for a needle in a haystack.The brush in my opinion is the most important thing it`s on a par with your water needing to be pure,but the brush major system suppliers are ignoring.We shouldn`t need to be hunting round trying to find better alteratives ie diy,they should be available of the shelve.One of the main reasons is the setup costs in designing a new brush,to have a new mould made up for making a new brush can cost between 5-10,000.