The cracking relates to the type of material that the cap is made from. It's a much harder plastic than the vinyl cover that is there right now. When I put mine in it went in just fine. There were some fitment problems around the vent (it will take quite a bit of work with a sharp knife to get it right). Keep trying on the bottom trim piece to make sure it hasn't gone too far. The spedo area didn't fit perfeclty as my original dash was pretty warped.

Looked great for a year, then it cracked (I followed all the instructions and used their glue etc). I just think they are not made for harsh winters and thermal extreems (hot or cold). Your's could last for a long time.