If anyone is looking for the flash file here is a linkHow to switchback to kk from L or M without fastboot:
0. Wipe all except internal storage and usb otg
1. Flash kk firmware (including modem; if you have problem with proximity when calling, flash radio image from fastboit)
2. Flash kk rom
3. Flash kk recommended by the kk cusrom OP
4. Flash supersu (optional)
5. Reboot
How to upgrade from kk to L or M:
1. Wipe all except internal storage and usb otg
2. Flash L or M (including modem)
3. Flash L or M rom
4. Flash gapps
5. Flash supersu (optional)
6. Reboot
http://d-h.st/QAY
Source : https://forums.oneplus.net/threads/...llipop-and-getting-back-to-my-slimkat.226048/
edit : TWRP/ CWM Flashable.
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