You said that you didnt trim them much and could have done more trimming sooner. Looking at the pics I woukd agree. I see a lot of excessive fan leaves. Knowing you have 3 plants in that small space I would personally try to thin out the plants moreso than you did with these. Starting at the bottom, look at your own pictures and see what leaves look like they are in the shade in your own pictures. By more aggressive, I dont mean to strip them naked all at once. I am saying to keep up on them and thin them out as you go along vs trying to do a bunch at once. When you have 3 plants in a small area keeping good airflow is a good habit for multiple reasons and it will also allow more light access to bud sites. It is hard to know what is "too much" or not enough trimming on Autos when the phenos can be different on each plant we do. I totally get it, and that is something that each person has to determine what is best for their situation. Too much trimming at once can slow things down or inpact yield. Not enough trimming and yields, quality, and density can suffer. Generally you can pluck a few leaves every couple of days starting at the bottom and it will keep things more maintained and stress free. Think about people who do scrogs. Anything under the scrogg net is pretty much trimmed completely. That is because the light gets blocked out so much that the undergrowth will yellow up and die off from lack of light. I am not a super aggressive trimmer on Autos, unless I have done the strain a few times. So many factors on how Autos yield, so I like to see how plants do with minimal training or excessive trimming. Your doing a great job, keep up the good work. I am just letting you know that Roc Bud Inc strains get pretty big and grow aggressively. In general larger/more aggressive plants do better with Trimming vs say a small Short Indica Dom strain. Small, short, Indica dom stains tend to have less branches and leaves in general. Leaf tucking works well vs excessive trimming. I have not seen a small short Indica dom strain from Roc Bud at all. I have 2 White Cracks for example that are Indica Dom and they will have minimal trimming until late veg or flowering. Where as the Purple Scoops in the same little tent has been plucked upon a coupke times a week in veg.
Good luck, slow