Nozzle Choices

[printbus]

Welcome aboard!

Others are certainly welcome if I'm incorrect, but I believe the hexagon hot ends can print anything that the Magma can. Some of the hot ends have plastic parts or use a Teflon liner that can impose a limit on how high you can go with a print temperature. The hexagon is all-metal, so it won't have that constraint. By higher temp, it means you can print material like nylon. There have been a few that had issues with a hexagon, and have moved onto other all-metal hot ends like the E3D v6.

3mm vs 1.75mm gets a lot of discussion. In theory, 1.75mm has a debatable benefit in that the extruder stepper motor has a bit more resolution in how much cold filament needs to be drawn for the same amount of extruded material. On the other hand, much of the extruder hardware is sort of optimized for 3mm filament. It can be trickier to load 1.75mm because of this. If you might get into flexible materials like Ninjaflex, 3mm will possibly be easier to work with in the standard Wade's extruder used on the MakerFarm. It'd be less likely to "fold up" in the unsupported gap between the hobbed bolt that draws the filament and the barrel of the hot end.