,Congrats!!
About that cone thread hiding thing, I have one that is a small threaded collar, cylindrical -- not cone shaped. I don't know where I got it from but if you look around you could find it somewhere. This type will look better IMO. Neither one will restrict air flow.
Here it is : http://www.empiremods.com/category_s/64.htm?searching=Y&sort=5&cat=64&show=10&page=2
Maybe with a large tank the cone one does look better. I use a small dct and a mini Vivi Nova and this one looks better.