Was watching movie. lol.
But....tibs....that's real cool. Nice step-by-step by whomever. Tell him good job!
I'd have to try it to tell you more. The only concern on fusing the negative contacts is a short-to-ground on the battery since battery case is often negative. But...lots of people use fuses on the negative size I guess. IDK where the light-pipe is either. Not sure I see it in the pics (the outside finished pics...I know he didn't take a pic of installing it).
Overall very impressive. Large mod, lotsa mah. 4 volt min, but that wouldn't bother me, I'd just use higher ohm coils.