ORIGINAL: speedracerntrixie
Have you thought about bagging the molds with some peel ply and breather? Doing so correctly will help you with the corner issue ( Would require less thickened epoxy ) but would yeild a lighter, stronger part.
The parts will definately come out lighter but not necessarily stronger (unless you add more fiber). The wall thickness ends up being thinner than an unassisted hand layup so our thin walled structures are much more prone to buckling. Buckling is the most common form of failure in in thin walled composite structures. Whenever you increase the Vf (Fiber volume fraction) the laminate must become thinner (unless it's heavily aerated). When you start increasing the Vf you often have to add more fiber to offset the reduction in thickness. The end result can be lighter and stronger but with a higher degree of labor due to having to add more fiber..
Put another way, if you take two identical layup schedules and one is bagged and one is not, the unbagged layup is almost always stronger.