Thank you so much for this, you have saved me much doubt and hesitation.
Alas, ebay links are not permanent...is the supplier called panpa1688? I found it by searching for that "10set-5color" title and it was still intact. I would post the apparent current version (USA) of that ebay link, but then...
Ok, but like I said, not permanent: https://www.ebay.com/itm/284616540836 .
I would be tempted to just go for this style instead, very strong springs:
https://www.aliexpress.com/item/4001072043961.htmlEven the genuine ones are not terribly expensive, but they may not be easily available outside of europe.
Although I do like the angled entry part.
These also look interesting
https://www.aliexpress.com/item/32872176812.html