Mystery ATARI 8-bit from eBay Restoration and Upgrade

Описание: In this episode I finish a half upgraded ATARI I bought on eBay which is not what it says on the badge. It needs some cleaning and restoration as the keys are yellowed and the case is marbled from a previous restoration attempt.
Apologies for my voice being all over the place, I am still recovering from a cold and my vocal cords are still not okay.

Here are the promised links for the upgrades in the Atari
YOOMP!
https://yoomp.atari.pl/
[you can buy a physical copy, but digital version (download) is free]

Ultimate 1MB board:
https://lotharek.pl/productdetail.php...

TK-II-Stereo
https://ataribits.weebly.com/installa...

AMP hookup schema
https://ataribits.weebly.com/uploads/...

SIO2SD (biggus dickus version)
https://lotharek.pl/productdetail.php...
00:00 - Intro
00:19 - Task description
01:30 - Disassembly
02:47 - The surprise
03:34 - The plan
04:28 - Keyboard disassembly
06:26 - Cleaning and Retr0brite
07:58 - Fixing the upgrade
10:01 - Test 1
10:38 - Reassembling the keyboard
12:00 - Case modification
12:24 - Final assembly
13:00 - Test 2
13:50 - Yoomp!
14:15 - Conclusion
14:37 - SIO2SD box
15:52 - I Love 8bit computers
16:08 - Outro