I wanna rebuild nautilus bvc heads

Actually, i DIY all of my juice, but never thought about rebuilding. I only started using my Aspire Nautilus tank a few days ago and saw that someone posted a video about rebuilding Nautilus BDC heads. I said to myself,"I could do that!" I am considering about receiving BVCs in the coming several days and wondering if anyone had rebuilt one of those and use basically the same procedure. I would not mind rebuilding these heads to save some bucks in the long run although these BVC heads on official authorized website are affordable.