Dont waste your time, this router will never get a working firmware , neither dd wrt not lede managed to solve the bugs it has , its a pity for such a good router, not even d-link is updating its FW ,has the same since 2015.
but risky on installation, please someone to give the proper installation guide, its not time for us to risk with the 10+ different ways in that link, Proper way with the mac fix!