Do you put the flexwatt on the back of the rack or on the shelf.
The most efficient way to provide proper temps is by providing belly heat.
what about basking light?
BP do not need any additional light all they need is a cool side and a warm side provided by the heat tape.
When you use tubs can you still use big water dishes?
I have 2 racks and the largest water dish I use is 5 inches in diameter, healthy mite free BP rarely soak so an oversize water dish is not necessary and a waste of space.