Retrohax has written a blog about upgrading a Commodore C16 to 64 KByte RAM and adding an internal IEC2SD. This C16 also has a double OS and extra heatsinks.
2020-01-17 - 12:16:00 - Week: 3 - Item number: 7736 - Category: C16, C116, Plus/4, Hardware

Commodore Banner Exchange