Greg-Kuehling-Wades Extruder Optimized for E3D V5 3mm

This is yet another remix of Greg-Kuehling's famous extruder. I started experimenting with E3D v5 but could not find one with a tight fit. All-metal versions of J-heads and E3Ds are similar, but not the same, which is frustrating because people are making them for one and claiming 100% compatibility with the other. For instance, the two models I found online claimed compatibility with both. However, after mounting my E3D, I found too much lateral movement on the throat, which caused me to create