Rack temps

[Ascended]

With a single strip of heat tape in a rack this will always be a variable.

Yes, but is it ok for just one heat strip on one thermostat? or am I being to controlling and over the top spiting them of into 3 ? are a few degrees difference ok? Genuine question. I don't know
Also I believe heat strips can be cut to size, so one at the bottom, one at the top and the rest in the middle, is that possible, or unnecessary?