With the F410, instead of changing nozzles, you swap out an entirely different print head that has the nozzle pre-installed to manufacturer specifications (heated repeatedly to 280*C and torqued to 20 lbs per square inch). This prevents any possible chance of misalignment. We ask that you do not disassemble the F410’s print heads. Fusion3 print heads are covered under your 3D printer’s 2 year warranty. Swapping the nozzle on an F410 print head will void the warranty for that print head.