Yes.
Might want to take a look at what gets locked out in soil when you go below 6.5... just something to think about.
The more I hear, the more I lean toward under-watering. The more roots there are, the more often you have to water. The watering frequency needs to keep pace with the root growth. I would give them one good watering and feed them 1/4 strength.
Seriously,
if it were me, I would water twice before I fed...

OF has lots of nutes already in there and I like to give things a chance to settle, if it's possible I may have gotten them off track. I really think you are going to be good from here. If you did knock the pH off some with the one feeding, it's not likely to end up being a big deal. With nutes... less is better until you get enough experience reading your plants to know when to increase... not quite enough doesn't matter much... too much can jeopardize your whole grow.
I hope this helps and good growing. X