Yeah, I'm getting help from someone in a discord server at the moment. He said it would be safer to set all the existing values to 1.00 for each perk and then add a conditionless new entry point to achieve the 1.20, 1.50, 1.70, 2.00 bonus because deleting stuff inside the existing perks could cause them to no longer pop up in the forge menu.
I still need help on how I get my perk tree to have the shape I want and the new branches. Is it just guessing at where it will show up in the game's screen? How would I best tackle it? copy the contents from the existing perks into a new perk and delete the existing ones then?