Thanks for the info. I really thought it was going to be bigger than that, close to 28" based on how much room is in there.. I'm just getting started on my 80g build which is ~24" dia, and i actually dropped by bottom rack about 2 inches from the 3 o'clock position (~10" off the bottom of the tank to the top of the rack) because I thought i was going to be a little tight on room. Looks like you are pretty close to the 3 o'clock position based on the pictures, and looks like you have plenty of room. My RF plate is going to be roughly 5.5-6" off the bottom leaving me about 4-4.5" between it and my food.
How much room did you put between the racks?
Again.. Awesome build, and really similar to the one I'm getting ready to start, other than yours is a touch bigger and trailer mounted.. Mine is just going to be mounted on posts just off my deck in the backyard. I hope it turns out half as good as yours.