Cindy, I have retrofitted my Orchids with $1.21 Replacement Acrylic Tank for Orchid V4 RTA Rebuidable Tank Atomizer - translucent at FastTech - Worldwide Free Shipping and the one with the frozen bottom-fill screw with $3.02 Universal Replacement Top Cap w/Refilling Hole for Kayfun / Orchid RTAs at FastTech - Worldwide Free Shipping and I am a happy camper. They now hold 5ml!
I love the look of those plastic top caps. One of the things I didn't like about the metal ones was that it made it look so clunky. So the chimney reaches OK for you? I didn't like the way it just barely kissed the o-ring on the metal top cap. Maybe a little better fit on the plastic one, huh? My Orchid's taking a break. I had been using my gennies for awhile and got used to the tight draw - now Orch's a little too airy, so switched to my KFL+ V2 for now. Still saving up for the Aqua V2. Then I'm done. (yeah, right )