A couple of thoughts....one, make certain anywhere the arms are mounted is on a reinforced rib under the skin. Second, with care one might be able to bend the arms, but would require a mandrel, and it may require packing the arms with sand to avoid a collapse while bending. The advantage is of course you can make them fit like a dream.
Happy trails and Good Luck
Ms Tommie Fantine Lauer, Greensboro, NC
AIR #31871 WBCCI #4165 K4MTL