Hi,
As to mixing cards, problems have been encountered by many people when;
- mixing different brands
- mixing different cards of the same brand
- mixing different revisions of the same card
- using multiple instances of identical revisions of the same brand card
To be honest it's a bloody lottery. My advice is buy what seems like a good card from a place where you can return it if all else fails.
That's the best guarantee you'll get,
Fot myself I use the Dvico Lite and a a TinyUSB wothout any issue.
But no doubt someone else is using the same mix and cursing it.
E.E.