I finally finished the cleanup of the drawings on the 7/8" and 1" diameter arbors. Those two drawings plus the ones on the two nuts, two 1/2" spacers and the arbor driver (fits both arbors) are now in Downloads in the Atlas Drawings category/folder. As the other spacers are exactly the same as the 1/2" pair except for length and as most of the drawings are absolutely terrible, I elected not to waste the time to make them legible.
The drawing for the M1-570 Shell Mill Driver is finished and has been uploaded. You will find it in DOWNLOADS under the Atlas Drawings category. Sorry to take so long. If anyone spots any errors, please let me know.