I am intalling vinyl siding on a new shed I built. The fron (with the gable end) cam out great. The side has worked out well except for the last pice that meets the soffit. The last pice want to be a full pice less the nailing strip. I can fit this into a J-channel that is up against the soffit F channel, but I have no way of securing it in place as I can use the punch tab tool through the lock channel just below the nailer. Any ideas?