@dwette I am using a Wall Shelf, but not for my Vinyl Source, it is used for a CDT and Valve DAC.
I am aware how the Vinyl Source works on a Wall Shelf with different methods of supporting the Sub Platform and have remained with a construction for a support I have developed over quite a period of time.
There are friends I visit who have their set ups on a Wall Shelf and a few have the P'holz in use with the Wall Shelf.
I can not fault these Vinyl sources when I am experiencing them in use.
My Wall Shelf is fastened to a Block Wall (maybe Cinder Block is the US Term).
I have used the not too costly fastenings in the link and can offer a reassurance that these are able to be trusted, I have put quite a few Kilo's (Granite Slabs) on my Shelve before I supporting any valuable audio devices.
If a Block Wall is the option, the fastening search is over.