I am a big fan of soft copper washers for keeping PLA in.
I am tempted to make up my own diamond hotend but with only two extruders so I don't need to update my electronics too. My main machine has a separate second extruder and I only ever use it for printing either one filament or the other. Two colours is just too much hassle with mediocre results due to one hot end dribbling while the other one prints. Having two extruders connected to one nozzle would solve that. I don't know how this would work with say ABS and PLA hooked up at the same time. I suspect that extruding ABS would cause too much heat to go into the PLA and cause it to swell and block or melt and dribble thru the ABS. Probably best to have similar materials in each feed.
I am tempted to make up my own diamond hotend but with only two extruders so I don't need to update my electronics too. My main machine has a separate second extruder and I only ever use it for printing either one filament or the other. Two colours is just too much hassle with mediocre results due to one hot end dribbling while the other one prints. Having two extruders connected to one nozzle would solve that. I don't know how this would work with say ABS and PLA hooked up at the same time. I suspect that extruding ABS would cause too much heat to go into the PLA and cause it to swell and block or melt and dribble thru the ABS. Probably best to have similar materials in each feed.
