i understand and appreciate rack systems and do realize that there are some very affordable hatchling racks for small breeders especially - BUT - tell me why this will or will not work - if you picture a metal closet shelf about 10 - 12 inches wide - length is irrelevant for this discussion - cost of and ft piece maybe 10 - 12 bucks, i'm guessing plus another few bucks in hardware to mount it nicely - then an equvalent length of 3 inch flexwatt laying on the back 1/3 of the shelf - contolled by your preferred method, ie. be it as cheap as a lamp dimmer to as high as a proportional then shoebox tubs sitting side by side for hatchlings - i mean, i been thinking - you gotta buy the tubs anyway - you gotta by the controller anyway ???? so, for 10 or 12 hatchlings - what could be wrong with this? - i could easily see this entire setup well under 50 bucks if one built his own temp control system - which raises this question - how hot does flexwatt get if not regulated??