Hi, i have a problem with the carriage, it's not in the track. Its been like that since i got it about 6 years ago. I didnt realize it till today. Its leaning againt the track, and I've been running it like that forever. I don't know how to put it back on...there's no room to just push it in. Also, i was wondering if i needed to place the blade holder into the groove on the carriage arm? Or just on top? When i place it on top, i have to push the blade out all the way...and somehow its not even reaching anymore.