IlleGal,
Good morning. Glad the plants are doing well. I realized I didn't know what the origin of your plants was. Feminized seeds? Clones? I guess my point is, are you sure they are all female.
Another point that you might consider for the future is that it's always easier to run just one strain in an Ebb and Flow table. Nutrient needs and growth characteristics could vary and cause issues. One example is that your White Widows may need more Mg. I'd usually use 1/4 tsp Epsom salts as a preventative with Widows. But yours may be different.
Keep in mind that there are a variety of training methods. First familiarize yourself with the basic ideas. Some are more complex and advanced. But they all have one commonality which is the purpose...to select where your buds will grow.
Uncle Ben's topping method is a dual topping technique with 4 main colas.
https://www.rollitup.org/advanced-marijuana-cultivation/151706-uncle-bens-topping-technique-get.html
Then there's LST and supercropping. Two different methods to train plant mainstem sideways to allow side branches to become top colas. Both those techniques would require more horizontal space and so would not be advisable this run.
And a more advanced training method called main-lining. I only mention this one because I have a link for a great tutorial with pictures. There is one here by Nugbuckets...but this one (also by NB) has better pictures. This one may give you some ideas regarding lower branch trimming and such.
http://www.growweedeasy.com/main-lining-technique-nugbuckets
It's always a good idea to allow some healing time but if you try to get most trimming/training done by week one of flower...you should be good.
One thing I used to do is to move plants around...like furniture arrangement. You can sometimes save a few budsites that way. Meaning rather then cut a branch off...find a better place for the plant. Capiche?
Take care,
JD