That's almost exactly how I've got my racks set up, Nate... The only difference is I keep the thermometer completely mobile... There's a couple of reasons for this..

1.) Affixing the thermometer probe directly to the tub will create a cleaning disaster in the future. Maybe not the first time... but nice smooth tubs are what I like for cleaning purposes.

2.) I move my thermometer around quite a bit... I have four stacks of racks, and four thermometers. Every week on cleaning day, I move the thermometer to another tub in the stack it's in. I reset the min/max's on everything (in/out/humidity) and then leave the thermometer in the tub for 24 hours... check min/maxes, and then either move it again, or leave it until the next cleaning day, and check min/maxes again. Works really well for me...