I have a battery bombed Iici with several legs of the MMU (and multiple traces) eaten away. Aside for the MMU, the other chips look salvageable. I have a Bolle Iici new board and some parts for it and had planned to use a IIsi board to salvage chips /IC's as a backup. However, now looking closer and before starting a lot of work, I'm not so sure about the MMU. The text on the MMU from battery bombed CI is barely visible but is consistent with this picture of a CI MMU I enlarged from "Recap-A-Mac". The IIsi MMU is a picture of the board I actually have. Can I use the MMU from the IIsi board to replace the damaged one on the Iici board?