I've installed fpv in several of my tanks and trucks and had a lot of fun with it, but it's been my experience that, while most people think it's very cool, not very many RC tankers are getting into fpv. I don't understand why that is, but I have found it to be true. I would very much like to see more guys using fpv, as I think it's a great addition to our Hobby and provides some features that will make for excellent videos. I know h l is adding an fpv feature to their tanks using a smartphone, but I haven't seen one in person yet. If anyone has one of those systems I would really like to see some video of it. The one disadvantage, as I understand it, is that the cell phone FPV systems tend to suffer from a lot greater lag time then an fpv system with a dedicated transmitter. As for being able to put the stuff in the tanks, I think the biggest problem is having to add another battery. Most fpv systems run on 12 volts and the tanks run on seven. I put fpv in my hetzer, but since that's a 1/6 scale tank there was plenty of room. But, the basic components for fpv don't take up very much room. In one of my trucks I have the entire system except for the camera installed in a wooden crate in the bed of the truck. Stand By and I'll get you a photo of that.