@Vaporific Its hard to say but it is entirely dependent on the manufacturing costs, which are dependent on how many pieces I will need to manufacture.
As the hopper is not my product or have a decent way to gauge the interest in the quantity i will most likely put up some interest check or pre-order form once I have the costs more figured out.
As it stands right now with no known quantity, and things are subject to change, I could see the full kit with body extension, dummy battery and external power supply coming in at around $79-99USD.
The original plan was for a complete backend replacement, but we feel this design with the body extension is more versatile for those wishing to use external batteries or their own power sources and will also be cheaper to manufacture.