Using the open/close method. open = eMMC, closed = UBIFS
Tried with multiboot - no luck, tried with bootmenu-n900 - no luck.
Tried every concieveable .item file configuration.

I will miss multiboot, as I had MER, UBUNTU, Meego, SHR and NITDroid running off SD's with multiboot - and also tried NITDroid on a partitioned eMMC - worked great - v.fast but got very hot !
Yip - the fine tuning script worked great on second reboot, the device is whistling along - faster and smoother than original !

Now to adding back all my applications - Queen Bee Widget and Fcron have revolutionised the way I use my n900, mainly saving 3-4 button presses per function, and automating functions, respectively !