X (Gantry) Rail Acceptable Max Temp, A250, Enclosure

So, after about a 6 hr print (bed at 60C, head at 195C for all but first layer) noticed the X rail, not just the hot end casing, was so hot I couldn’t comfortably hold my hand to it for more than about 5 sec. Definitely hotter than the build plate at print finish.

Everything ran fine, but curious what the intended design max is. Want to monitor with a laser thermometer probe during longer prints, see if I need to break them up and let it rest instead.

My max temps on the linearmodule of the X-axis were about 55°C in the enclosure of A350.
Pinted >5hours, bed 100°C, head 250°C.
Measured with a voltcraft IR260-8S.
(I did a stress test some time ago, because thinking of a defective linear module)