I have tabbed in my transom, and am ready to start on my stringers. 18oz roving is 8$ a yard, 1-1/2 oz CSM is $6.30 a yard and 1708 is $15 a yard. As I understand it, you need to layer CSM in between layers of roving. This totals $14.30 a yard and is only slightly less than using the 1708. Seems...