What topping does is stop it from growing taller, so if you have space issues id go ahead and top it. And if you do chop off alot itll grow more/larger fruit as it stores the sugars in the roots it made, and now having less to feed itll have more sugars lying around. Tho with hydro im starting to wonder. I was told to chop off alot of my pepper flowers to get more peppers but didnt and EVERY flower made a full size pepper.