This semi-retro technique to build DIY computer was inspired by this amazing piece of art ("The Cardboard Computer"):

https://hackaday.io/project/19048/instructions

I decided to implement my own very similar approach for "Germanium Calculus" project - namely The Corkboard Computer concept ;)

I started with these things that I stumbled upon in the local grocery store:

As you can see it's 125 yellowish tacks for $1.99 or about 1.6 cent per point!

Then I bought these cork tiles in another store (4 tiles 12''x12'' for $7.49):

Then I successfully tried to solder something to it :)

For now I think it's the best way to finally build my "Germanium Calculus"...