Yep, the tension on the switch is unacceptable, it kills the Mod. I have taken it apart and it appears the spring assembly is press fitted in. I contacted Vaperz Cloud Facebook group and they state that there is a way to disassemble it with a how to video forthcoming. My recommendation is to avoid the V4 until they fix it or publish a viable fix.
Sent from my HTC 10 using Tapatalk