cube u65gt: need stock recovery after 20150908 OTA

[gdp77]

Hi friends!

My cube u65gt was unrooted and with stock recovery, so I received all the updates up to 20150908.

Yesterday I decided to start playing , so I installed twrp, made a full backup with it and then rooted with rootgenius. Everything worked ok.

The problem is that -I think- if a new OTA update ever arrives, I won't be able to install it since my stock recovery is replaced with twrp. So I wonder if there is any link with stock recovery (after 20150908 OTA), just in case I wil ever need it.

thank you.

[ADB user]

CAMERA : AS per instructions here, sometime back I had rooted and flashed ROM to try and use the external keyboard. It worked, all was well, Camera was not operational. Now I tried to RESTORE. Camera app appeared, but when tried, it would display that Can't open Gallery, then later when tried "Can't connect to camera". I tried other camera apps from google play but none can connect to camera. Now the Camera app is also missing. I tried to restore again back to user backup data, but the same issue. Added to it now I can't seem to download any app from google play, it is giving an error !!!! What to do?
Kindly help as I am a layman.