I did the same as that Luke about 6 months ago,i did it with a 9" .The price they ask for them brushes is a joke,there a good brush but not £50 good.If you look through the replacment parts section on some websites the actual brush is listed as a spare part and can be bought for £12 yes that`s £12,the price does not always reflect the quality of the product,yes there a good brush that is only designed to work with either there gooseneck or an ionic pole but the brush is not the best i`ve used.With that brush not cleaning the frames isn`t an option,the bristles are soft and will splay all over the frame making you have to clean frames every time which is not always needed,saying all that you have made a good job of converting it.