ok well about 5 months ago i started on an incubator, i was making it out of a door fridge, well i realised that it would only hold like one small clutch box, so now i built one out of a big fridge. and i added the two strips of 3" by 3' flexwatt i had for the small one its not enough so now my question is can i run two mor peices at 6 foot lengths or do i need to do 4 at 3'. another words will it hurt to run a couple differnt flex watt lengths on one therm.