Your question was recently kicked around in this forum

https://groups.google.com/forum/#!searchin/rec.aviation.soaring/Round$20out$20and$20flare$20with$20fully$20open$20 spoilers$20in$20a$20PW-6|sort:date/rec.aviation.soaring/m7AnPvT2knQ/5AXqN0EyCQAJ