40 year old ex-alcoholic with chronic pancreatitis, suffering from recurrent severe abdominal pain undergoes pancreatico-jejunostomy (Dilated MPD - around 10 mm with multiple ductal calculi). Head coring not done as there were no calculi in pancreatic head. Unfortunately returns a short time after surgery with recurrent abdominal pain. How to best manage - coeliac block, medical treatment with increasing analgesics, distal pancreatectomy?