Ahh thank you for the link. Suppose this snuck under my radar over the years, Either I haven't had a problem, or, being unaware didn't attribute a problem I was having to it and somebody else fixed it for me (boot repair/software). Quite possibly the process of cloning the raw partition image from the OE disk restored the legacy MBR that the enclosure needs? This makes sense considering everything seemed to be there, and it didn't look any different after cloning part3 from the OE disk. I do not recall all the options I chose in clonezilla, I do remember checking -no check/fix -raw -+ hidden data before part -no stop on bad sectors. I had so many disks connected to the computer at that moment much of my attention was focused on making sure I didn't accidently wipe my laptop OS or the OE iomega disk.
Possibly the wiki covering installation on a new disk might footnote the iomega's incompatibility with GPT causing boot issues with the link from above. Though, it's not 100% known this was the issue, it appears likely.