With the advance at 14 the larger spring does not engage at all because of that long loop. If I open it up again I might throw in a different spring. The tuning keys came with a set of springs. It's running great at the moment, so I'm just gonna leave it alone for now. However, I'm not sure I got the right kind of tuning keys for this distributor. I set it up by using the bottom of a 7/64 drill bit in that slot and verified 7 degree movement. The tuning key for 14 degrees is about one and a half times the size as measured with a digital caliper.