there are slight variations in tile thickness which RCP has already explained is due to production run batches. these are simple to resolve with techniques RCP has already posted.
i do recall jpn market tracks have the tile pattern reversed as well, correct?
age of track, the extent to which it's been used and or abused, temperature, humidity levels and the flooring it's installed over can effect the perceived hardness, noise level and leveling of the track.
|