Temp at the nozzle is lower than the temp at the heat sink and filament feed. is there a case where i should be using an insulator to keep the heat in the nozzle as opposed to sinking it away?
Better not to change designs. Part of the design is a heat break to separate area with fluid and solid filament. Insulating might change that and cause the extruder to clog. This difference is normal and normally no problem at all.
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