Following last week's release of the tough, non-stick ObXidian drop-in replacements for the A1 and A1 Mini machines, there's now the Diamondback. Fashioned from uber-hard lab-made diamond, the E3D DiamondBack hot end for A1/A1 Mini is a simple switch that offers top abrasion resistance. The obvious appeal of a nozzle like this is printing abrasive filaments, but the idea of never having to buy a nozzle again because it'll outlive the printer is also appealing.