Has anyone else had problems with the knights armor pen kit? I ordered the starter kit and put one of the pewter kits together with no problem, but when I went to assemble one of the antique brass kits the cap wouldn't go on all the way. I took the cap out of the other antique brass kit and it wouldn't go on either. It looks like dried epoxy or something inside the top of the caps. I poked and prodded until I was finally able to get one on.