mash as usual, collect wort and boil for 15 mins, cool to ~100, add lactic acid to adjust pH to ~4.5, add good belly, blanket with CO2 and saran wrap, when taste/pH acceptable (3.2-3.3) boil for 15 min w/ hops and cool, transfer to fermenter and pitch yeast
For 644, pitch at 75 degrees and ramp to 78 after 2-3 days of fermentation. Give starter several days to build up. Under pitch slightly and possibly no aeration for a fruitier result. may need to let sit in fermenter for longer than normal to achieve FG. (Ferment in upper 70's)
Try dry hopping with: 2-3 ounces?
Amarillo
Nelson Sauvin
Citra (2:1 with Amarillo)
Cascade
Mandarina bavaria