I think there is a time limit on edits on this forum, so I'll post updates on this page instead.
Here's a guide on how to get Gentoo Prefix running under SailfishOS. I've made it for the Pro1, but you might be able to use it for another device.
If you know what Gentoo Prefix is, do not expect it to be the smooth ride I'm sure it usually is.
If you know what Gentoo is, but not what Gentoo Prefix is: the short of it is that this basically lets you install Gentoo as a normal user in the directory of your choice, minus the kernel (since one is already running). You cannot mess up your