Drinking, I dare say, a Niagara/Peach started in early February. I'm noticing almost all of the "welches" flavor has gone away. I think the 71B yeast rounded and added some flavors that have masked the Niagara a bit. The added frozen fruit helped too.
I'm starting a new batch using a Vintners Harvest Peach (96 oz), some Niagara/Peach concentrate (one can per gallon less than the batch I'm drinking), and a few pounds of Peach (4 lbs) and Mango (8 lbs), plus three nanas. Sitting in the bucket with 2x the normal pectic enzyme. Will test SG/TA/pH in the a.m. and go from there (currently at 5.5 gallons @ 1.065). Still planning to use the Lavin 71B yeasties. Might go buy some more frozen peaches as they were $2.50 per lb.