Question: what is a GOOD expected recovery rate? What indicates a good paystreak?

I've moved my wash plant and started a new dig at the convergence of 3 streams. The "recovery rate" indicates between 43-48% recovery in the current area of my dig. Is that a GOOD rate? Still seems like it takes a LONG time to get even a gram of gold.

Something to assay areas for a good gold return would be helpful.