Flashforge all-metal hotend

This isn't a printable item, but I figured I'd post it here anyway since it's somewhat relevant and I've got a 3D drawing of the piece to show. Might come in handy if you have the requisite tooling to make this part. I came up with this design by putting together some elements of E3Dv6's heat break (ultra-thin heat transition zone with 0.4mm walls) and Jetguy's brass nut trick, which helps conduct heat from just above the transition zone to the aluminium cooling bar.

Flashforge Creators are Chinese clones of the Makerbot Replicator 1 Dual but with an incompatible aluminium cooling bar, which means you can't use a standard M6 threaded heat break as most Reprap hotends use. Also, the stock heat break has a Teflon liner which excludes you from printing with any of the higher temperature materials like Nylon. Technically, you shouldn't be printing ABS either, but I guess that's borderline.

This piece is a drawing of the replacement heat break I machined out of a stainless steel half-threaded screw.