Okay..........15mm crank bolts have been removed with a Park 15mm socket wrench. A standard puller only threads in to the drive side about 2 threads comfortably and starts getting pretty tight. I think somebody beat me to the non drive side. It starts in about a thread and a half and it's cross threaded. I will check with a LBS tomorrow afternoon.....maybe they have the proper puller and can chase the threads?