Lol. its one of those things that theres so many ways to do it and we all have things we like and dont like.
I personally think 5 gal buckets are a bit too small unless youre keeping fairly small plants. He loves them.
What you have in the pic appears to be correct for that setup though.
one thing you could do for a bit of flexibility.. Keep your 3/4 pvc in the middle and put a hose barb on the end of that little manifold area so you can run tubing from your pump to there.
Thats how I did mine. you can kinda see it in this pic, but the hose barb is right behind the pole lol.. tubing comes in hte right side of the tent and wraps around to the back.
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