I have a huge black cherry tomato plant. I tried to limit it to 4-6 main stems but it is more now. It is so dense they are popping up all over. My fruit is not significantly smaller then before - despite getting enough fertilizer. All my other plants are producing bigger fruits (like this one did at first). I am pretty sure it is the size of the plant - to big and producing to many fruits. There are hundreds bigger then a pea right now.

My questions is how do I prune it to make larger fruits? Cut down a lot of stems? Cut off some fruit - if yes what sizes?