I just placed an order with Duane for 2 Austin High Back Tilt Back chairs with extra full Q21 cores. I chose these cores because I wanted to avoid leather "puddling" as the chairs break in but I am a little concerned that these cores are not as comfortable as the standard cores. I would appreciate any information on standard vs. extra full cores from people who have the Austin High Back Tilt Back chair especially with regard to comfort. Thanks.