Should I boost my Rozena rubbers?

says nothing
From the ones I know or saw, they would use 1 layer (or 2 max) on Butterfly, to just soften it up a bit and give it some kick
I mostly only saw these 3 out there
T05 Hard

The words from them - everyone is doing it.
I tried boosting some EUR rubbers (with Falco Long Booster) and saw that it works best with hard, dense sponge. Boosting with softer rubbers would make them mushy and even loose bounciness.