There is an interrogation about the real effect of the ratio:
ok you want an 50% height ratio so your first layer will be 0.2 instead of 0.4
but is the plastic flow reduced accordingly or is it still the same ?
if it is the same it means the layer will be over stuffed with plastic, better surface aspect but some blob on the first layer
if any body could give the definite answer because it's not clearly specified somewhere I could find
thank you
(i think it is the same but i'm not sure)