K, my uncle is partially paralyzed right now and I've been building on an idea to help him out. The problem he has is, the cartlage in his knees has disintegrated to mush, he is anemic, and he weighs about 300-350 lbs. He cant walk for too long at a time because he will grind the bones of his legs and and this will cause swelling throught-out his legs. This is really bad because it reverses the drugs he uses to build his immune system and take of weight when his legs swell up and the skin cracks causing a nasty discolored infection. So, I came up with a design for a walking machine that will help him rehabilitate if it works right. I want to post the design sketch I made somewhere and see if I can get some help with mechanics and maybe some pointers on the subject. My design is basicallly a wheel chair revised to let him stand up. However, he'll be in a harness so he can reduce the weight and pressure on his knees to like 50 lbs. Then he can lose more weight, build muscle, and hopefully be ready for his next cartlage insurgence. Its suppose to happen in like the next 5 years because of time. They have to wait to space out the surgeries so his body can handle it. But, maybe, the mashed potatoes he has for cartlage right now will be surfice if he cuts another 100-150 lbs by exercising in this thing I dsesigned. I just wanna make sure that when the machine is finished, it works well enough to last awhile and not break or break him. Thank you. bassbuildinbubba@yahoo.com