Originally Posted by ToniGe23
Club member of mine has a Topico an ex Graham Bantock boat, below the water line it's been rubbed back with 1200 grit and it sure is a slippery bugger in light winds!
Agree 100% most noticable difference is in light airs. I measured 2 hulls with push test across swimming pool 10 meters (without rigs) 20 times to find average measure between boats touching other side of the pool, then sanded one hull and it made gain of 10 cms !!!
Over 100 meters that = 1 metre