I have read almost all pages of this thread(there are quite a few), so please accept my apologises if somebody has already said this.
Recently bought a
SD49225XA-HNR from Andy, and looking at the mounting bracket thought it might fit my SD59230U-HNI, so tried it , and yes it does. So if you want a nice compact mounting bracket compared to the standard bracket. Try PFB305W .
Might not be listed for SD59230 for weight ?, but feels sturdy enough to me unless you've strung somebody up on it, or you live in Hurricane Ally.
Standard PFB305W
Not the best pictures I'm afraid , but looks much neater in real life. Just need to replace allen key bolts with grub srews.
Is mounted to my test mount, but this would not be needed with PFB305W as there is room for wires and comes with seal(not shown)
Unlike some similar brackets, does not use the screw adaptor, so saves a bit more room.