Improved Endcap for Dyson DC 44 Animal

Oh, my lovely wife, I taught her how to clean the brush bar of our DC 44 Animal as we needed to clean it more and more often as we just got two long-haired dogs. However, she took a pair of scissors to the "coin screw" slot that you're supposed to use and basically ruined it. So I had to design a new part.

I realised with the amount that this dang part it silly that I need to keep finding a coin to open the brush bar. So, I took the opportunity to improve the design slightly and put a lever t