I test my home made electric prosthesis of an elbow of an arm at 5 kg, at 7 kg and at 10 kg 1

Again and again I try to make a cheap homemade electric prosthesis of an arm. As an elbow is the simplest part of a prosthesis of an arm I try to make an electric prosthesis of an elbow of an arm. In this video I test my cheap simple homemade prosthesis of an elbow of an arm in lifting of little loads of 5 kg, of 7 kg and of 10 kg. My handmade device was broken after lifting of 10 kg, but it did lift load of 10 kg and it lifted 10 kg not too slowly (compare with another my device in my video slow prosthesis of elbow 1) I think Something Very Good invisibly helps me All parts of this my homemade device cost less than 200 dollars (compare with prices of commercially available electric prostheses) Of course, I understand that my homemade devices are many times worse than prostheses made in factories or made by professional skilled workmen (for example, my devices have too high level of noise), but so many disabled people in my Russia and in many other countries have no money to buy commercially ava