Medical devices and instruments for use by amputees; Prosthetic devices, limbs and components; modular attachment mechanisms for use as part of or in connection with prosthetic limbs; Prosthetic devices and components, namely, socket system; Prosthetic devices and components, namely, sockets, ovens, sleeves, coatings, linings, modular base, pylon and foot devices; Prosthetic sockets, namely, adjustable, reusable, contoured, and customizable sockets for use with or as part of prosthetic limbs