My issue is that I bought a 2012 Cobra trailer, and I don't know what lockset it has. It is currently about 1000 road miles away, so I can't have a look. I do have a full set of they keys that were available in 2012, so I am hoping I can get into the trailer if it is locked.

So, it sounds like there was a change somewhere along the way in at least the EK500.

I hope this trip doesn't become more work than is already planned....

Steve Leonard