129 fig8 as before the combined total strip at the shroud side 106 comprising portions 127 and 128 is thus u201c bifurcated u201d into two segments the crease or gap between the axially aligned strip portions 127 and 128 makes folding or gathering easier during dimensional adjustments however the unitary adhesive strips 130 132 fig8 at the bottom rear and right rear side of the shroud need not be bifurcated horizontal crease 129 fig8 at the shroud rear is aligned with and parallel to elongated horizontal gathered portion 129 b fig6 at the front of the shroud that results from pinching during dimensional adjustment similarly vertical crease 125 fig8 that separates strip portions 122 120 the formation of the elongated vertical gathered portion 125 b at the front of the shroud in fig8 the pinched or gathered portions 125 b and or 129 b fig6 result from width or length adjustments and their formation is aided by the fact that the strips are bifurcated i e the corner portion 122 may be deployed first while dimensional approximations are made mentally during prefitting then when the approximately correct size is gauged by manually pinching together and gathering the sheet material i e changing the size of gathered regions 125 b 129 b strip portions 120 and 128 may be deployed first.