Thinking of buying Schneider Componon-S 80mm f4 for 6x7 printing. According to Schneider brochure, it covers up to 6x6 format only. Has anyone tried using this lens enlarging 6x7 negative with success? I use Sauders/LPL 670 enlarger and have the recessive lens board for medium format lens. Comments on this combination appreciated. TIA.