this plate is a lot of tinkering and extra work so it would make sense for it to be an optional additional expense. it was a lot of work adding it to the mod after it's built though, and would have been easier done if it was done as the mod was being built I think. of course your free to use the idea. this is also a perfect place to sign and # the mods for the girls
I like this thin trim line because it really balances out the mod visually. with just the one heavy band of copper it almost looked like it needed something else copper to tie it in, maybe a copper atty or copper band in the atty cap? or a copper drip tip?, something... but now with that extra thin accent line the mod looks complete in it's own right and stands alone, it doesn't look like it needs anything else to support it or tie the copper in now, it looks fine even with a full stainless atty I think. that band really does what the richlite does like rossum said
I was having the same thoughts and second guessing not getting the richlite caps because the mod has a more complete, defined and distinctive rich look with the richlite framing it out, the lower thin trim does the same thing in a way, and really I think it needs to be razor thin for a nice balance. I tried this with a thicker band that matches the top and it looked bad. I also tried it with just replacing the whole lower cap with a copper lower cap same thickness as the upper band and that too didn't look nearly as good as just this razor thin band. I do think it might have looked really good if the whole lower cap was replaced entirely with a 1/2" thick base of copper, twice as thick as the upper plate but I don't have any 1/2" copper stock laying around. that might be something I'd think to do next time I place a metal stock order though
really I think the razor thinness adds a certain look of precision and look of fine craftsmanship and makes it look more rich and beautiful because of it. not sure how a wrapped band would be easier tbh, this thin plate is def the easiest way to do it I think. it gets drilled same as the mod, then the battery and upshaft holes are enlarged slightly so the threads don't contact, you could then drop a thin insulating gasket sheet on and it's isolated. truth is it would only be live while firing anyway, may add a little shock to your vaping experience without the isolation
here's how is fits on the bottom of my mod
and here's how it fits on the lower cap. for you it would def go on the lower cap like this I think
I might attach it to my lower cap too. I didn't show pics of it broken but I did at one point crack my lower cap in half too, I didn't fully polish out those seems so you can still see the seem here, split right through the middle row of holes

I don't think anyone will break there dibi as much as I have