The discussion suggests that a truly decentralized system would have devices that can be easily created by regular users without relying on a central power. For instance, hard drives needed to store Bitcoin transaction records should be able to be produced at home using a 3D printer starting from raw materials. The email also highlights why the use of the simple SHA sum for mining is preferred over complex functions such as scrypt, making it easier for small-scale entities to understand and produce ASIC miners.The conversation then turns towards do-it-yourself (DIY) manufacturing of ASICs at home, which is within the scope of what could be accomplished in a home environment. While relevant-scale mining may not be an option for home manufacturing, Bitcoin wallets and other devices can certainly be etched by hand or using maskless projector lithography. The email provides links to various resources related to LCD projection lithography, DMD lithography, and even a method of doing this with conventional camera roll film.