Good thing nowadays we have the GT Micro driver to fit in the Utorch UT01 / Manker E11 / Lumintop EDC05 :P (physically identical in size and shape to the original/s in these lights)
Did my EDC05 with the GT Micro driver few days ago and it was a much less painful process than all the work that has been put in here (probably less satisfactory as well, but.. )
It was still painful to press fit the bezel and the switch without the necessary tools, but few little scuffs here'n there later, it all came into place :)
Very happy with my unbranded EDC05 running Narsil (although I should've enlarged the switch hole as it is with the Micro, so the indicator LED would actually be visible, as it's located underside the switch's PCB.. )
Got the driver configured with the indicator LED Off for now and not sure if I won't leave it at that since a 14500 cell only holds so much juice inside it anyways..
Still waiting for Gearbest to deliver my UT01 (because it has a screw in bezel, thus it'll result in a much cleaner job) for almost a month now and the order barely got shipped on yesterday.. :/
I guess I'll buy another GT Micro driver meanwhile. I'm happy with the EDC05 still, but i really can't stand the press fit bezel and the scuffs that had to result from me pressing it in..
I also haven't had any kind of grinder to get the copper MCPCB slimmer for this host (in fact this would apply to all of these 3 hosts equally true) thus the bezel still got ~.2mm a bit over being flush with the head.
Even though I've used a slimmer o-ring for the glass lens, the reflector and the body had slight grooves for it, thus slim to no difference had resulted from it (at least the pressure on the bezel was bit lower though)
With the Utorch UT01 / Manker E11 hosts this would still be mitigated to a degree because of the screw in bezels - just screw the bezel ~1 turn less, but it's still going to be fit and not going anywhere.