Its not the weld quality that I'm concerned about, its the basic expansion/contraction you get when you have temperature varriances. Welding is important to keep a track in place and not move (see Chunnel rails -- what would have happened had they not welded the track).
For example, would you think they are going to have a cold room on all night?
What about when the ride was constructed -- were certain elements of the track built during hot parts of the year, then others during a cooler part?
I'm sure Vekoma has thought of this, and if you look at joints in Barnstormer you can see they allow for tolerances. Just curious if these temperature changes a) are important and if so b) what does a coaster manufacturer design into the track to compensate for heat variances.
Expansion and contraction happens all the time day and night -- I'm not concerned about the quality of weld as I'm concerned about the effects of the Florida summer heat outside on the track, rain, the somewhat rapid cooling off through the rain, and the cold room being switched on and off throughout the week. So you have parts outside, parts inside, climate controlled.
I just think it would be interesting to see how they compensated for that if it was a problem (and no one knows this except engineers). The rest of us can guess and surmise.