JY said a 4 section should be totally ok, do not concern with the marginal endurance required by an extra 35 min. If you have the time and can get extra sections to put in there, yeah I don't think it's a bad idea to do it though.
... to you. In a unknown domain, with lots of fuzzy words ... , you are unclear in the domain which is being discussed,there ... be understood as the fundamental positions being stated.. poorly or adeptly ...