After a more research and testing, I found out that I can use, presumably, 'extract_compressed_fs myimage > extractedimage'. Is this correct? If so, good. But, when using this command, it goes thru the script upto Block 117 with a line that loops LIke:
Block 117 length 58183 => 65536

Then, my next line says

Size 68206 for block 118 (offset 7539785025143614) too big.

What gives? I know the image is good cause it boots. THanks for any and all help.

mark