I built one of these years ago, and did not have success the only time I tried it.
Would this need/benefit from, a humidity dome?
What is the on off schedule for watering? I have used 1 minute on, 7 minutes off, for other aeroponic grows.
FWIW I have never used a dome. My timer works on a 15 on/15off. But I see no reason your 1on/7off wouldn't work.