Hi - have hunted for some of this info - but haven't found it in one place... I have a P2 with a H3-2D (jan 14) with GoPro 3. I also bought the iosd mini and the bluetooth data link. I would love to upgrade to H3-3D with GoPro 4. I'd also like to add the Lightbridge. What traps, pitfalls and workarounds do I need to be aware of? For example, I read I will lose the Bluetooth functionality...is there any workaround for this? Will the H3-3D just be a plug and play upgrade? Lot of money so wanted comfort from all u experts! Thanks.