The print quality of my E3D delta printer had gone progressively downhill. I investigated and discovered that the hot-end was not being tightly held in its bracket. Instead there was a significant amount of lateral play causing layer misalignment (first grey print). I liked the look of DragoslaV's 'E3D V6 holder for 3DR' but I had bought the version with a separate pneumatic valve to hold the Bowden tube. I used Blender to graft the valve socket from RichRap's original J-head design onto the top part of DragoslaV's new bracket. I printed the two parts in blue PETG, my new favourite filament. You can see the improvement in the second grey print.