While waiting for them to be approved and for them to show up in the DLS, I would like to suggest also having a look at the "Guide"series I made back in the day for TRS2004. A bit long in the tooth but still functional. Guide 2t 3.5m, Guide 2t 4m, Guide 2t 5m, etc. 2t is how many tracks can be attached, it ranges from 2t to 5t. The 3.5m is the C-C distance between the tracks and ranges from 3.5m, 4m to 5m. Your track attaches and replaces the invisible (red) track that is a place holder. The push pin is a Surveyor only piece that helps find them once they are placed.