Hey guys, I have an old gary fisher wahoo that i picked up for free from a friend. It's currently missing the front derailleur, but the previous owner told me that it is supposed to mount to this weird plate thing between the crank arm and the bb tube. I can't figure out if I need to buy a braze on derailleur or something else. I've also heard of "E-type" front derailleurs, but I have no idea what that is. Any help would be appreciated. Thanks.