That might work for a location with a single copy of a server in a single location but how does this get me the Last full backup of my Tax server 4 times a year from my scale-out repository?
Pre-job activity finding and setting the latest full backup as a job source and proper schedule options should be a way to go. Though, I understand that it's not that convenient as one'd expect.
If I'm not mistaken, you appear to be the first one to submit this request. So, thank you for the feedback; highly appreciated.