Good job with the new step. (checking roots) Just don't drop the rootball, and careful with branches.

Roots are looking good with what looks like plenty of room. Shouldn't need to chop-n-re-grow, lol.

I'd flush and wait a week, then resume 1/2 nutes twice a week. Have some patience during recovery.

More medium equals more rootspace. Ever try putting the drainage rocks in the drip tray instead of inside the pot? Much easier on transplant day, (picking out rocks can damage the roots) and after harvest. (when you have to fish-out the rocks for cleaning and re-use)
You do have to watch ingoing water and it's runoff, but that's an easy adjustment worth making. :thumbsup: