Just to close my contribution to this thread, my customer returned my hard drives and RAID enclosure yesterday and I refunded all but my attempt fee from the $1,000 security deposit he provided part way through the process. After many
weeks of effort running ReclaiMe's Drobo recovery program trial against the clones/images on a PC running a fast i7 with 16GB of memory, it was stalled at 38% complete with virtually no disk activity and limited memory usage. He has abandoned all hope of recovering the data. ReclaiMe tech support suspects that the file map is damaged/incomplete
and that scuppers any recovery hopes. Very disappointing.