a dual use repeat builder assembly comprising a multiply inner sleeve with a bond layer surrounding its outer diameter for securing a compressible foam layer to the outer surface of the inner sleeve . a hard foam core is formed around the compressible foam layer using a mold cavity . after curing , the mold is removed and the ends of the hard foam core are machined creating cavity regions at each end . a notch insert is positioned at one or both of the cavity ends . a polymeric resin is poured into the cavities to form end caps . the outer surface of the hard foam and the end caps is machined to produce a smooth surface . an outer sleeve is mounted onto the hard foam core using compressed air with a resulting interference fit between the outer sleeve and the hard foam layer . location of the end caps are such that holes can later be drilled through the wall thickness to convert the repeat builder to a bridge mandrel to enable mounting of thin sleeves to its outer surface . after extended use and wear , the outer sleeve can be removed by expanding it with air and replacing it with a new outer sleeve thus extending the useful life of the unit and / or modifying its outer diameter .