I climb trees in northern California and out here, we have some tall trees. Traditionally, climbers have used crossbows and bows to launch smaller shot lines (or sometimes fishing line) over a branch so we can climb it. a few years ago, some wise person made what is now a common tool, the Bigshot. http://www.treestuff.com/store/catalog.asp?category_id=285&item=455 THis is a pretty effective tool, but, even broken down, it's 4ft long and weighs a few pounds. I have been strapping open face fishing reels to crossbows for years and recently decided to outfit a crosman, wrist braced with an big old saltwater reel and it's ok. I was wondering if anyone here might have ideas that might help, or even better yet, some experience in the matter. the goal is to create/modify something that can send a projectile and very small line 100ft. vertically and still be small and light enough to carry on a hike with a whole MESS of other gear. I'm new to the forum and can't post pictures, but i have pictures of my current rig. It is simply a slingshot with a reel on it.