Putting aside the debate of the merits of inmast furling, I would appeciate assistance from owners who have vertical batten sail with their inmast furling systems. I've searched the archives and found plenty of comments. However, I wanted to tie together the manufacturer, the size of the roach and ease of use. I have found several manufacturers, including MaxRoach, Doyle, and Head, who offer vertical batten sails. Three areas of assistance - first, some appear to add substantial roach while others are more minimal. Jack's Place, a contributor to this site, has pictures showing a huge roach added by his vertical batten sail (but I don't know who manufactured his sail). One obvious point, I would think, is to add as much roach as possible. The second area of assistance is the width of the 'slot' in the mast to accomodate the vertical battens. My slot barely measures 1/2" and I've been told some manufacturers require more than. Finally, with the added battens, the area within the mast may not able to handle the vertical battens; some lofts offer a sail with partial vertical battens that don't overlap and hence don't take up as much room. I would like add as much roach as possible, using my mast with a 1/2" slot, and obviously not run into trouble with insufficient room inside the mast. If anyone has specific help with who manufactured their sail, how big the roach is, and whether you had trouble with the slot or storage inside the mast, I would be greatly appreciative.