I'm planning a snake rack, however the flexwatt doesn't have the exact size I need. From what I've read, you want to have it under 25% - 33% of the tub. My tubs are 23" from front to back, which would put 33% at 7.66" and 25% at 5.75". I was hoping to cover closer to .33%, so, umm, should I use the 11" tape and cover about 48%, should I use 4" and cover 18% or should I go the icky route and use two strips of 4" to cover 34% of the tubs and use more outlets (another thermostat)? Thanks in advance for any help or advice.