That's intense hahaI used my Switch, in the dock, to resize a 2nd SD card's fat32 and ext4 partitions. So, if you have 2 SD cards, you can install L4T to both, boot using one of them, and resize the other from within Linux, using a USB SD card reader, with both it (w/SD card) and your Switch (running L4T on your other SD card) plugged into your (official) dock.