The crushing and screeing equipment owned by the TVA was transferred from job to job, and the availability of this equipment was one of the factors in determining who would produce the aggregate.

Dear, deary me, cried my mother, what a disgrace upon the house! And your poor father sick!

So I shrugged and shifted like my grundies were too tight.

No need for heat-shrink sleeves; egg-crated cavities in the housing give you the insulation you need.