Well, I have been putting this off for months, but finally gave it a go... And all the effort was for not.. Seems these bad boys are just too placement sensitive, and would have required days and days of tinkering to find that sweet spot..
I love the open sound achieved by having mains hung from the ceiling, but these monsters were my waterloo..
Defeted in my attempts to make them work from this arrangement, they are once again back on terra firma..
I type this, as I have encouraged others to hang their mains as opposed to placing them in book cases, or sitting them on stands, and still believe this to be a valid arrangement.. Just not for my beloved M-Eighties..
I did however replace the plastic feet supplied for the bottoms, with heavy felt pads..Four per tower.. They now sit much tighter to the tile floor.. A nice look..

Gee that's too bad.
I would have loved to see a picture of M80s hanging off the floor.

You know, I had thought about it, but I was so warn out by the end of the ordeal.. (MAN! Those things are heavy !!) Not to mention I had my wife helping, and she was not the least bit excited about this 'crazy idea' as she so lovingly put it.. When they didn't work out, I wasn't too excited about sharing my crazy idea with the rest of the world..
To tell ya the truth, they didn't look all that bad.. Different, to say the least :>
But the sound just went away ? They became thin and airy.. Just a ghost of their former self..
Movie watching wasn't too bad (VP150 QS8's subs making up the difference), but music was a total loss..
But hey, I'm sure in better shape now after the workout..

and Kreskin says, "man, just once I wish I could see them on the floor".