After successfully installing CentOS Userland 7 (latest available arm-dev release as of 5/3/16) on Pi2 or Pi3 on an microSD card larger than 32Gb, the system fails to restart and the microSD must be completely wiped and re-imaged. Have tried this with Pi2 and Pi3 (just hoping) using #10 64Gb and #10 128Gb microSD's. The system runs fine unexpanded on any size card.