alright, attempting to install my donahoe bumps in the rear on tuesday and i need to remove the stock bump stop pad on the frame which requires me to "drill and/or grind" the 4 rivets on each side to remove the pad. now heres the question. what is the proper way to drill them out? i googled it but couldnt really find an answer. should i start with a pretty small bit and drill the very middle of the bolt and just work my way up until the head of the rivet begins to spin to show ive drilled it out or is there another process? i also purchased my first angle grinder the other day, would this be a better route? yes, i realize im pretty tool illiterate, but you gotta start somewhere, right?