cap 26 has each of its opposing ends 90 92 scored a and miter cut b each of the scored and miter cut ends e g 90 thus yields three foldable sections 94 96 98 each of the foldable sections 94 96 98 is foldable about its respective transversely extending score line 100 102 104 spanning the width of the respective foldable section 94 96 98 as shown in fig6 the foldable sections 94 96 98 may then be folded about the end 90 of the protective cap 26 and adjacent support block 20 in any number of ways to form a protective cap layer 106 over the otherwise exposed end not shown in fig6 of the support block 20 for example central foldable section 96 with the opposing miter cut axially extending side edges 108 110 can be folded axially inwardly to abut and secure with glue to the otherwise exposed end of the support block 20 the two opposing outer sections 94 98 can then be rotated axially outwardly to abut and secure with glue to the outer periphery 112 of the end 90 of the protective cap 26 similar scoring and mitering of internal areas of the protective 26 can yield fork channel cutouts e.