I am getting back into trains with my grandkids and we have built a simple layout with a few loops and some track spurs. I used EZ-Track since it looks simple and all my old track is 40 year Atlas stuff. I am trying to isolate the track segments but can't get the EZ track connectors off so I can use insulated connectors. I tried to just pull them off and wrecked a few pieces of track already. I read one comment about cutting at the end with a Dremel but I can't figure out why it is so difficult. Am I missing something or are they just not supposed to come off?

A PS - none of my old engines or cars will connect to a new Bachmann switch engine I bought for the spurs. The old couplers do not look anything like the new ones. Can I just replace the old ones?

Thx in advance