1. Flashlight: a) as 'hat', like speleologists have b) as attachment to gun or helmet 2. Jetpack As some kind of 'minimal' vehicle... no new technology needed, you just 'sit' in it and voila. Should be crafted, and maybe use Hydrogen gas to run? May be not economical, fragile, no armor, but i miss it while mining in mountainous regions... and may need some unused-yet minerals like zulax to craft?