The attention to your launcher is well-deserved. You and your son have done a terrific job! The design, the attention to detail and the craftmanship is what I (and I suspect most spudders) appreciate from your posts. Your approach to launcher building is novel and refreshing. You did it your way and you did it right. Thanks for the unselfish sharing your experiences with us. Reading about people's experiences is one reason that I frequent this forum regularly. Whether "it's been done before" or not, has no bearing on YOUR work. I hope that no one is inhibited from posting their ideas on this forum because "someone might not like it" or because "it's been done before".
Note: For what it's worth, I do not believe the the previous post was intended in any way to demean your accomplishments.