To you guys with this exhaust, how hard is it to put the silencer in? How hard is it to take it out? Do you always use the screws to fasten the silencer in? See, I picked up a used Rallispec N1 exhaust and it came with a silencer. The tip of the muffler doesn't have a hole drilled into to put the screw through, so I'd have to drill one. Also, it is a royal pain in the ass to put the silencer in and take it out. So I was wondering about those questions 