lollipop downgrade package possible for honor 6 plus

Hi I'm new here, don't be too harsh

Currently I'm running lollipop beta for honor 6 plus (b305) and I would like to downgrade again to KitKat.

So after searching here and there I found this

Hxxp://consumer.huawei.com/my/support/downloads/detail/index.htm?id=52093
Replace xx with tt*

The instruction PDF file is for honor 6 plus, means I download the right package.....but when I try to update I failed at 10%.

I don't know why I failed.

So if any member want to try this please download it and share your experience. ;)

Thanks :)