Arf, my solid top cap arrived today and I have a problem too. I can't screw the pin further than the first thread, even with the oring off
Back it off, use a little moly grease on it and then try it again with a wrench. If that doesn't work, then you can either send it back or you can put it in a vise in the garage and get a large monkey wrench and try it again. If that doesn't work, put the wrench on and slowly move your car until it's touching the wrench, then hit the gas and really try to force it down. Make sure the wrench is on their tight or it could spring back, fly through the windshield and kill you. If that happens, have a surviving loved one send it in for repair, then have them send me your ELA.
