Some MBR0520L to see if i can actually work with stuff that small. I ordered some from ebay, a week or two ago. I've no idea what they sent, nor did they, they wouldn't send the correct items as advertised, so I got my money back, and ordered via Amazon, and they are the correct diodes. 40 from a seller on Amazon was cheaper than via Farnel incl. postage. I only need a few, most will be dropped on the floor, I expect.
I've been with ebay for years, don't buy much, but recently I've had 3 out of six orders go bad, and I try to assess the quality of the supplier, not just their star ratings.
After wating for the stars to align and the wind to change, I tried soldering one of the diodes to the Nano pcb this morning. Not having the set-up that I had before, I managed to position the chip, using a scriber, but the liquid flux surface tension stuck the chip to the scriber point. My soldering iron tip is far, far too big, and I had to use a 10x jeweller's loupe to see what I was doing. After a few attempts, however, I finally soldered it, and the Nano now seems to work via usb. Not financially, or otherwise worth the effort, but quite chuffed that I managed it - and I can rinse and repeat 39 more times, since I never lost any diodes...