I had to on mine, so I would say yes. It shouldn't take much pressure though. Mine needs a little (maybe 2 degree's) of elevator downtrim for level flight, so maybe I should have pushed down a little harder on the front. Nah, it flys likes it's on rails, so thats perfect enough for me... You can always add a couple of flat washers under the front or rear of the top wing for minor trimming, but im not going to bother. I love the way it flys as it is.