clipping the tips of the fan leaves for clones is done to focus the new clipping on initial root growth. Once they are rooted, and looking healthy - like your plants - i don't think it's helpful.
Think of those nice big fan leaves as individual solar panels - they absorb the light and transform it into energy that the plant can use to do all sorts of things. So, clipping tips during veg is sort of like knocking out part of your solar panel. Make sense?
To allow for more light penetration, try some very basic LST (low stress training). Just carefully bending the top stems outward downward to expose new growth works for me. Think of it as adjusting and arranging your solar panels to make room for more solar panels. (rather than lopping part of one off to make room for others.
Admittedly, I spend too much time playing with my plants.
Good growing!!!!
Zo