I've never used an MDD before, but I bought some individual components, planning to build my own. Anyway, tonight I noticed that the MDD CPU module has 3 screw holes. Out of all of them, only the one closest to the RAM slots has a small hole under it.
I thought that maybe these holes were designed for some kind of support, because the module is kind of flimsy; it wiggles up and down a little bit.
Then I noticed from this article
https://www.ifixit.com/Guide/Power+Mac+G4+MDD+CPU+Heatsink+Replacement/1625 under steps 3 and 5, that his CPU module has what looks like some kind of support bracket, but when I looked on ebay for any, there weren't any results.
Do you guys have a support bracket of some kind for your CPU module?