I'm in the process of building my first SS and am rather new to real mountain biking in general. I'm building off an old Norco Bush Pilot (the black paint with teal and pink stickers makes me think late 80's). Right now i've taken it all apart and the frame and forks are primed. Right now i've run into this little issue: crankset. I'm in college, therefore money is hard to come by. Stock on the bike is an old biopace-sg...dang thing is riveted together. My question is this...if i get new bolts for it, can i dremel the old pieces out of it and use what i need to put it back together? I know i can just leave it as is and put the chain on the middle ring, but i'd rather it look like a single too if i can. Thanks for any help.