I've tried a few times to mount my expensive Sonos wall mounts for the Era 100 speakers unsuccessfully. The first time, using the anchors Sonos provides in the kit, the weight was too much for the wall and it started pulling out immediately, would not sit flush with the wall, so I took them down. I patched the holes and moved on to another attempt.
I tried a few other anchors since, but they all have issues (toggle bolt holes are too large and you can still see part of the hole when the wall mount base is installed, screws are not flush and therefore prevent the wall mount cover from sliding onto the base, etc.)
Anyone have any suggestions other than drilling directly into wall studs (no studs located where I'm trying to put these speakers) or returning the mounts (too late to get a refund and no longer have the boxes or the original hardware that's now fallen behind the drywall)?
Currently I'm most likely looking at taking the loss and buying new cheaper mounts that do not have the same restrictions, maybe selling the originals on eBay.
Thanks in advance.