My X1 has been 100% stock because its just works so well. However, this upgrade solves all the things that made my X1 such a pain: different nozzles from all of my other printers, slower heating times, and the complete pain when changing nozzle diameters (the worst experience on these printers). Now all of my printers share the same Revo hotends, and I can swap on the fly!!
Flow rate is fantastic, and I got a 40% faster print with an obxidian 0.6mm than the equivalent hardened bambu nozzle with ABS-GF filament. I had to crank up the settings in orcaslicer, but I got the install and updates in less than 30 minutes, not including the calibration check.
I still have some oozing, given the improved flow, and the wires to the hotend could have been about 5mm longer, but these are nitpicks on what is probably the best upgrade I’ve had for any 3D printer!!!