From Philz to Flyme (official firmware) MX4

Good evening everyone.
I write because I have a problem with the installation of the CM on my meizu MX4.

I ran perfectly the procedure of unlocking the bootloader, and once unlocked, I flashed the recovery Philz. Later I tried to flash the CM with adb, but in at end it always says "Installation Aborted". I tried with the patched recovery and with cofface, but I just can not flash it.
I then tried to do a wipe cache but no with any recovery that I flashed always appears to me:
"E: Can not mount / cache / recovery / command
E: Can not mount / cache / recovery / log
E: Can not open / cache / recovery / log
E: Can not mount / cache / recovery / last_log
E: Can not open / cache / recovery / last_log "

I read here http://forum.xda-developers.com/meiz...x4-m1-t3201715 that I could flash the patched rom deleting the file uboot.img and preloader.bin but I can not find anywhere the second file, and also I'm afraid to brick the phone ... someone has already done it?

Tell me that at least in the future I will be able to install the CM. Loved and hated Flyme.

Sorry for the English and thanks in advance for your reply.