After calculating resistance for the tap system I'm about to set up, I'm going to have to use 5/16" lines. Does anyone see a problem with using a shank with a 1/4" bore at the tap end of the line? Will the sudden drop in size at the very end of the line cause foaming or anything? I have seen one 5/16" bore shank but it wasn't all stainless and I'm trying to stick with SS.