Methods of affixing a device to a support structure are disclosed. One and two-piece implants are described, made from materials that are biocompatible, and may also be biodegradable. Two suction pipes are connected between a suction tee and the suction check valves of the manifolds. The user issued accesses the decryption portion and employs the validation information therein to validate the digital signature of the authorization portion. Additionally, the bis-naphthopyran compounds of the present invention exhibit broad coloration ability, fast response as to both color change on activation and return to original color, and good fatigue-resistance.