I built a rack the other day for hatchlings and now i realized i dont know how to heat or wire it up .. so im gonna build a new one hopfully before Xmass but my question is the following

these are for ball pythons

belly Vs back heat . it doesnt really mater does it ? as long as the hgot said is 90-92 correct? or does it mater ....

my understanding is for back heat you use heat tape and stick it to the back very simple but what if something goes wrong and you need to replace the heat.. you need to take the whole rack apart to get at it , so do you make the back wall a door or something ?

and for belly heat flexwatt... say you have 6 levels you need six plugs then correct? and can you rest the tub on the flexwatt or will it melt the tub ??