Regarding the spi lifting the bows for boats under ~20 ft and 10+ kts: is the lifting torque influenced by spi tack sheet trim? If you trim this do you do it only for power/efficiency related to point of sail or do you do it to influence bow lift and associated boat handling characteristics?
Also, from what I understand, on pole-end snuffer systems you usually can't adjust tack sheet trim at all since the spi tack is usually shackled to the pole end; also on mid-pole snuffer systems using a single halyard to set spi head/tack you can't trim spi tack independently of spi head. What kind of snuffer do you use and do you ever concern yourself with trimming the spi tack?
Finally, at the risk of showing my ignorance, what's "WAG 0 to 1 ft aft"?
