Hi all, First time poster... Let me start by saying I have been lurking these forums, among others, for a long time trying to perfect the concept of using a standard E-Cig as a delivery method for THC. I have tried and failed many times, to finally figure out the secret. I am returning the knowledge I have gained with my concept on the best way to achieve this. I have a "Riva 510" e-cig. There are many just like it. I use it for nicotine mainly. It consists of 2 parts. Battery and tankomizer. The tank I use is called a "CE4+". Highly recommended for nic use. When I want to vape THC, I just unscrew the tankomizer and screw on my THC "cartomizer". The solution I fill the carts with is PG based mixed with CO2 Oil. I vape 3-5 hits and I am blown away high. This is perfect for traveling, stealth, and medicating in areas where legally you could not before. Note: I believe USP Kosher PG (Propylene Glycol) to be safe to vape. If you are not comfortable, do your own research. I might post links to things explaining why it is safe later. Also, I am not trying to start a debate on PG based vapes vs. pure oil style vapes. I find this method to be FAR more convenient and less messy than pure oil carts. I will also post product links later if needed. You Need: Riva 510 Battery - $20 Smoktech Dual Coil Low Resistance (1.5ohm) XL Cartomizers - 5 for $15 Charger - $10 CO2 (BHO would work too) hash oil USP Kosher PG - $10 for a BIG bottle Syringes for injecting the solution into the carts - $5 Heat surface or temp. controlled flat grill Glass cup, Shot glasses, or chemistry tubes for mixing. I have experimented with different ratio's of PG : oil and I have found that 2:1 works very well. I heat the flat grill to 250-300 degrees F. I put a gram of oil into the shot glass, and put the shot glass into a slightly larger glass cup with some water. Similar to a double boil method, but without boiling. That cup goes on the flat grill. The water is displaced and comes up about halfway on the shot glass. The heat melts the hash oil to a nice amber sticky thick goo. I measure the PG (in this case I would try 1.5-2 mL) and mix it into the shot glass with the oil. Keep an eye on it and mix it for 15-30 min, until its completely blended. You don't want the mixture to bubble. If you are worried about heat, I place another cup filled with water on the heat, with a candy thermometer reading temperature. It usually stays around 150 deg. I suck up the solution with a syringe, and carefully inject it into the carts. You can use a dropper and drop the solution onto the polyfill in the carts too. You must do this while the solution is hot, because once it cools, the oil seems to separate from the PG. Once its in the polyfill, this no longer matters. The carts hold 1.3-1.6 mL of liquid. Usually lasts anywhere from 100-200 good hits, can last for weeks of mild use before drying out. 2-3 hits and I'm medicated. I love it! I have not had any problems with the atty in the cart getting clogged, or leaking. I have been doing this for months with success! I am trying to find a way to make the solution stay mixed even when cooled, and use it in the tankomizer. I am also testing other carts to find the best one to use. I have tried supplementing 20% of the PG with VG, to increase vapor production. It seems to work. I would like to try adding a flavoring while the solution is heating. Perhaps peppermint, to mask the oil smell and increase the stealth. I couldn't really find this information in one place anywhere, so I thought I would share the whole picture. I encourage you to try, and report your results. If you have further information that will help direct my trials and errors, please post! I would like for this idea to take off! Happy Vaping!