I have a Sigelei Zmax v3 relescoping mod and to be honest I hate it. There are a few things about it that drive me nuts. the screen is one. If you tighten down the mod to hard or if you mod is knocked over the entire screen and button housing will shift so now mine was knocked over from a standing position on the coffee table and I can only get it to fire if I press one side of it. The mod also has a lot of acceptance issues as far as getting errors like low load and short even with my protank and a normal 1.8 coil. The other thing is air flow on this mod I hate the post because to stabilize most of my tanks I have to screw them down so far that it blocks air holes. 1 final thing. If you do go witht he Zmax V3 the batteries they provide you with in the kit are not very good. I would recommend purchasing other batteries, and stay away from the zmax tank that comes with it, just throw it away. If you are purchasing the kit. TO be honest for the price you pay for even just the mod, there are beter mods out there. This mod pushed me to the point that I went mechanical spent the money on a king and a sentinel m16 and am so glad I did.