That is a nice set-up and your girls look great. I now realize that I should have done more research before buying my grow cabinet. A 2x4 closet came with a 35 gal reservoir with the cover having room for 12 plants. In reality, I could save a lot of work, water, and nutes growing in two 5 gal buckets in the same cabinet.
I am curious if you have a spare bucket to use for reservoir changes. I’m thinking you could lift the plant from the bucket with old nutes to the bucket of new nutes. Not sure if this is feasible?