One thing to consider... if you have a boat that varies from class rules, it now becomes custom and can have a different rating - even if the dimensions are the same. The inertia and righting moments can change and therefore the boat performs better than a class boat, etc... I understand about using parts and pieces around to make something work; but it comes with criticism. I built a boat out of spare parts that draws a lot of attention. Just consider it and accept the consequences...