Thanks @Manuel. I read your response on the other thread.
I did play with different custom partitioning choices in trying to install the different OS’s. None of them seemed to work. I would create a 1024MB partition and set it’s mount point to /boot. Then set the rest of the drive as a primary partition with a mount point of /
I also kept all partitions unencrypted also. But, for some reason Heads is not able to recognize or read the /boot partition. I was wondering does it matter what bootloader is loaded in the /boot partition? Is there an incompatibility with Heads? and the GPG keys and signatures Heads checks for those partitions?