I remixed two other projects into this pretty sharp little stand. I'm very happy with how it came out.
After combining the Galaxy Charger Stand with the S3 Stand, I modified the galaxy station to better fit the Samsung Wireless Charger model EP-PG950, the wireless charger that Samsung gave away with all Note 8 preorders. I aligned it so it better sits against the phone's sweet spot, so there's no messing about trying to line up the phone to make it charge. I also made more room to pass through the charging cable.
The only change I made to the S3 station was to add a hole for the charging indicator light to be seen through.
HE161192 - Cocoon Create Touchscreen 3D Printer
I made this with 30% infill just to give a bit more weight. However, with both chargers mounted its more than heavy enough to prevent sliding around. if it's still a problem or you want to protect your tabletop, some stick-on rubber feet should work nicely.