I use this fermat https://github.com/0xmatt1/xpmclient/blob/master/gpu/fermat.cl and add first lines from jOnn9 fermat.cl. And is the same copy just changing few lines. I doubt that all this time nobady have seen that. You have solution on this forum from 2014!!
The truth is that network difficulty (and interest in the project) has continually remained low enough that nobody really bothered to check!