Flashing ls660 using sendcommand.exe need a dev to look over commands

Ive been trying to recover my phone that was bricked but the commands that are given dont work. I corrected the commands so i can use the sendcommand.exe. The backup commands work but i am afraid to attempt flash. am I going in the right direction?

backup and flash laf

Code:

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dd if=/dev/block/mmcblk0p17 of=/storage/external_SD/OGlaf.img
dd if=/storage/external_SD/laf.img of=/dev/block/mmcblk0p17

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backup and flash recovery

Code:

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dd if=/dev/block/mmcblk0p19 of=/storage/external_SD/OGrecovery.img
dd if=/storage/external_SD/recovery.img of=/dev/block/mmcblk0p19

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zero laf partition

Code:

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dd if=/dev/zero of=/dev/block/mmcblk0p17

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UPDATE: I flashed the twrp recovery from recover_bumped.img using the command but it had a huge recovery on the screen and in the corner it said secure boot failed. I was able to reflash the backup and the recovery is working. Is there something wrong with the recovery image?

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