The "chunky" piece of plastic is of no concern. It has little mass and isn't going anywhere if you biff. If you want to manually turn on the camera, then that's great too. The DPro will indicate you've properly turned on the camera. The Hypeye mini has other advantages, such as setting zoom on certain camera models, and allows you to play back from the button/switch, amongst other things. Either provide a solution; the question is which solution you personally prefer. I like having the button mounted flush on my helmets.