I ordered some Tomix Fine Track for a project I have in mind (and also to see what it is like) and I'd like to share my observations and a couple comparisons to Kato Unitrack. First thing I noticed is that the roadbed for the Fine Track (top) is much narrower than Unitrack. However, it was about as stiff as Unitrack and it didn't feel flimsy at all. Both track sets have the same (Japanese) tie spacing and it looks like they are both code 80 rail. The Fine Track also has predrilled holes for nails. The back shows the real difference. The fasteners are molded in on the Fine Track (bottom) and cannot be removed like the Kato Unijoiners. Also, Fine Track doesn't appear to have an available transition piece so you can connect it to flex track. I'm sure you could make it happen with a little cutting and filing but . . . . Here's how the feeder attaches. It appears that every piece of track has the little cutouts for the connector. Ingenious but for looks . . . . Yea, I'm going to have to work on that.