You can try this method
But you have to use your device's specific files. And I think you must have Original EMUI 5 for it to work I don't know because I haven't tried it myself.
You can download OTA from Firmware Finder.
Sure, at least I need to download the stock PRA-LX1C432B115 firmware to restore stock recovery in case of bootloop
well, if huawei release it kernel source, of course i will make roms, here security patches..and some antutu points. then only issue is internal storage is very small but i guess can be solved with an sdcard with a class higher than 10..