First > unlocked Bootloader is required!
Download the 32 or 31 Retail EU FastbootFile > edit the xml that you use with RSD and delete the complete line "Motoboot"
Flash with RSD
Download the right Update.zip (31 or 32, depends on your Retail EU Fastboot) to get on 40002 EU over the Recovery.
After that you're able to apply the JB OTA
Sent from my XT890