I'm installing my combination motorsports dual valve springs. I noticed the factory seat had a locater. My kit came with the cranecams seats (part#99050-1) and they have no locater, just the upper retainer. Do you use the factory seat with the new seat, or ditch the factory seats. One more ? I'm using the K-D valve spring compressor (heads on car) and it wont catch the inner spring, any tricks or do I need a diff. tool. Later, Chris.