I've been perusing threads about tube rolling with the SR225's for a long while now. I've now decided that I'll go with a Little Dot I+ amp and either Sylvania GB 408a's or Mullard 6AK5 (the ones mentioned in this post) The problem is I can't seem to find these tubes anywhere. Could someone help...

Hey guys, I've been reading a lot about the Fiio, and I plan to purchase it next week. One question remains, though. How is the Micro SD situation? It appears to be able to read cards up to 128gb, but I've also heard it only reads FAT32. Supposedly the X3 can format the SD card to FAT32, but...