Good morning...You can see the latch in the first photo's I sent you, it's silver and looks like a buckle (also available in black) The latch draws it up tight and the track matches perfect every time. I did have to shim the ends of the track in a couple of places but ballast covers it all. The road bed is homasote that I cut in straight strips, for curves I just cut across the strips with band saw about an inch apart and two thirds across the strip then just bent it and stapled as I went. I posted a video on the three rail site. Do you mind if i send you an email? I can send photos and video easier there.