Support for new Archer c5 v4

The filesize of the openwrt and the tplink image are different. Will this impact the erase and write command?.
The filesize of the openwrt image is 7995392 bytes which corresponds to 0x7a0000
But the size of the tplink image is 8126976 bytes which corresponds to 0x7C0200

Does it make sense to update the erase and write command?

--------------------- UPDATE ---------------------

Problem solved by cutting the TP-LINK firmware as described here

Also the name has to be test.bin instead of tp_recovery.bin