My brother is the speaker builder in the family. An engineer, he has had articles published on his speaker design. As for building new enclosures, this might have been an option before my divorce as gave all the tools to my ex, I simply do not have the resources to undertake a such a project at this time. Also, I have had zero experience working with MDF, I know basically how to cut it, but that's basically it. As it stands, the actual integrity of the enclosure is fine.