I tried my hand at a sour last summer- french oaked cherry sour- used the Roselare Wyeast blend...honestly, not much sour after 8 months I realize it might just need more time. My projects this summer are a WWBY remake (although I am going to add lemon juice and mango, not just mango) and a Juicy remake (grapefruit juice)...so do I... 1. Use Roselare again and just be patient (a major weakness for this guy) 2. Use a brett blend with brux, lam, and claus and hope i get sour enough 3. do # 2 and add lacto/ped if after 4-6 months still not sour 4. other ideas... I use a belgian blonde or nut brown as the base typically. Did this for a Kriek once and it turned out devine...after about 18 months. Thanks!