Heya There TX!...
I have to throw in my 2 cents for your grow media...
I have used hydroton in netpots with an ebb and flow table and when your plants get larger and they have lots of pods on them the weight may make the bucket tip (unless those are seated really well, I never used the dutch buckets). Hydroton, is really light even wet... and so I have yet another (CHEAPER!) suggestion for you... Aquarium gravel!!! plain natural smooth rocks that you buy in a pet store, makes a great place for the roots, as you can flood in 15 minute increments you don't need to worry about the plant drying out that much... I used to flood my tray 15 minutes per hour...ie. 15 on then 45 off...and never had a problem. It may not be the answer with the dutch bucket system but think about the weight of a larger plant with pods...I just don't want to see you lose all your hard work again bud!, excellent job on everything.