Since 14.04 I have not been able to create a persistent install, with the casper-rw partition on the same drive, with systems created using SDC, UNetbootin, Rufus, Universal, etc.
These USB installs all work with persistent partitions, but only if the casper-rw partition is located on a different drive, either USB or internal HDD.
I also know same drive persistent partitions work with grub2 type installs such as mkusb or MultiBootUSB make, but am specifically asking if anyone has gotten persistent partitions working with syslinux installs post 14.04.