X2 on ToughTops and watching the youtube videos. We found it easy to do with 3 people but could be done with 2. Regard the spring and the horror stories about it because it can get wild. It seems the biggest problem is trying to catch the spinning vise grips if you let go. Also, the manuals have charts with the number of turns to make but we found them to be more than needed. The chart called for 13 turns on mine but we only did 7 or 8 and it has worked great. I'm sure trying to get the extra turns could have made it harder and more dangerous.
Good luck and be careful.