Update Firmware of TP-LINK AC1750 Archer C7v5 with DD-WRT Firmware via

Hi, I have the full instructions and need someone to apply them or guide me through until successfull firmware update.

Please read below:
https://wiki.dd-wrt.com/wiki/index.php/TP_Link_Archer_C7
then:
https://forum.openwrt.org/t/tp-link-archer-c7-v5-factory-bin-wont-load/22657/6
then:
use tftp recovery mode in U-Boot:

1. Configure PC with static IP 192.168.0.66 and tftp server.
2. Rename "openwrt-ramips-mt7628-ArcherC20v4-squashfs-tftp-recovery.bin"
to "tp_recovery.bin" and place it in tftp server directory.
3. Connect PC with one of LAN ports, press the reset button, power up
the router and keep button pressed for around 6-7 seconds, until
device starts downloading the file.
4. Router will download file from server, write it to flash and reboot.

I already have the .bin file which needs to be renamed and uploaded via server.
Then possibly to install Open VPN on this router.