On a 19' boat? Spend the money on something else. Practice your douses, drive deeper downwind and try doing a windward douse, leeward douse, letterbox, foreward hatch, etc. I've floan a chute on my 25 footer w/ 2 people and some do it single handed. I've used 2 socks before on larger boats, and honestly, I don't think they're all that great.
Merit 25 # 764 "Audrey"