A tool device for forming a joint between a composite skirt and a composite dome disposed within and joined to an inner surface of the composite skirt , comprising: a cylindrical skirt tool shell on which composite plies may be laid up to form the composite skirt , the cylindrical skirt tool shell including an outer surface intersecting a surface of the composite dome ; wherein the tool further comprises: a generally cylindrical spacer connected with the cylindrical skirt tool shell and filling at least a portion of a gap between the composite dome and the composite skirt , the generally cylindrical spacer being configured to be positioned, in use, just outboard of a tangent point where the composite skirt meets the composite dome ; wherein the generally cylindrical spacer comprises a plurality of tool blocks arranged side-by-side around a circumference of the tool device , the tool device having an outer cylindrical surface configured to extend in use from the tangent point on the composite dome ; wherein the cylindrical skirt tool shell further includes a circumferentially extending flange on one end thereof opposite the generally cylindrical spacer ; and wherein the cylindrical skirt tool shell comprises an outer mold line dictated by an inner mold line geometry of the composite skirt . a cylindrical skirt tool shell on which composite plies may be laid up to form the composite skirt , the cylindrical skirt tool shell including an outer surface intersecting a surface of the composite dome ; wherein the tool further comprises: a generally cylindrical spacer connected with the cylindrical skirt tool shell and filling at least a portion of a gap between the composite dome and the composite skirt , the generally cylindrical spacer being configured to be positioned, in use, just outboard of a tangent point where the composite skirt meets the composite dome ; wherein the generally cylindrical spacer comprises a plurality of tool blocks arranged side-by-side around a circumference of the tool device , the tool device having an outer cylindrical surface configured to extend in use from the tangent point on the composite dome ; wherein the cylindrical skirt tool shell further includes a circumferentially extending flange on one end thereof opposite the generally cylindrical spacer ; and wherein the cylindrical skirt tool shell comprises an outer mold line dictated by an inner mold line geometry of the composite skirt . a generally cylindrical spacer connected with the cylindrical skirt tool shell and filling at least a portion of a gap between the composite dome and the composite skirt , the generally cylindrical spacer being configured to be positioned, in use, just outboard of a tangent point where the composite skirt meets the composite dome ; wherein the generally cylindrical spacer comprises a plurality of tool blocks arranged side-by-side around a circumference of the tool device , the tool device having an outer cylindrical surface configured to extend in use from the tangent point on the composite dome ; wherein the cylindrical skirt tool shell further includes a circumferentially extending flange on one end thereof opposite the generally cylindrical spacer ; and wherein the cylindrical skirt tool shell comprises an outer mold line dictated by an inner mold line geometry of the composite skirt . <EOS>