I purchased a shimano 6/7/8 speed chain for my 97 schwinn frontier. I had to remove some links to make it fit the 7 speed freewheel, but it was still to long. In the process of determining the proper length I removed some links and replaced them. I think I have done this incorrectly. The chain is now locked up in a couple of places. I think I removed and replaced reinforcement pins in stead of the link pins. Is this fixable or have in made a $40 mistake?