Im using openwrt with sqm for some time now. But i have to adjust my download speed every day because my isp is a bit crappy

In other forums i came across over gargoyle and its Active Congestion Controller.
My device is currently not supported. (WRT1200AC)
But i saw in lantis signature that he is running a wrt1900ac with 1.9.
Is this version public available for testing? Or is it just a internal test build?
And can the Active Congestion Controller work with sqm ?
Thanks.