Prusa i3 Mk2 extruder cover - no wobble

i found that my e3D v6 had a bit of wobble when i printed the supplied extruder cover.

so i took off the top 1mm, hoping to clamp down more on the hot end at the top, and also added a small "bump" at the bottom to help move the heated block away from the fan mount by a little bit (also to lessen the wobble) as i normally print ABS, its started to melt the fan mount

i printed this at 0.14mm layer heights with a 0.4mm nozzle at 100%, and it worked perfectly. my e3D is now rock solid with al