Hi, My two cents worth, i had the se 300, on my previous boat, a Haines Signature 460br powered by a 4 stroke mercury 75hp, my son and i were belting along at about 35mph on the Port Hacking in very calm conditions when it flipped on to its side, i managed to pull back the throttle and it righted itself, scared the living crap out of me and my son, i wrote to Haines telling them what had happened [without mentioning that i had a foil fitted ] they replied saying that they reckoned i must have a foil fitted, and if i removed it that it would never happen again, it only happened once in almost 200 hours of boating, but its not worth the risk.
Regards Roy