Since we have working TWRP for MHC19J build - HERE , I have one question about flashing MHC19J to my Nexus 5x.
Every month I'm flashing security updates this way:
but in MHC19J build there is also a new bootloader - bootloader-bullhead-bhz10m.img and a new radio - radio-bullhead-m8994f-2.6.31.1.09.img . Do I need to flash this new bootloader and radio too? I assume yes, but I prefer ask first before RMA 
Every month I'm flashing security updates this way:
Code:
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash vendor vendor.img
Reboot to recovery
Flash the latest SuperSU