OK. You have the daughterboards done. this is quite essential as it helps the building process.
the A4000T is a “weird” solution with several DBs and if you ask me. feels very “hacky” you get a feeling Commodore was in a hurry doing this. It DOES fit in a standard AT Case. I guess that is a “improvement” from the 3000T. Anyways lets start building. This differs some from other amigas.
In my next step of buildguides. lets go to the Amiga 4000T.
As always. you need to follow my guide. This is not my project so see this as a “help” of building it. No support-center. and I will for sure NOT help you if you suddenly decided do go outside the guide. like adding extra components. other order or so. but this is “not supported”. I cannot help too much.
Obtaining components etc? well ebay? mouser? digikey? it is up to you to find them.
ok practical stuff done. lets gets started.