Just to add on on the trend of PV for RVPS.

I did PV for last yr enrollment and there were appx 39 appln for the 41 places in phase 2B.
I believe the increase of PV for 2005 and 2006 got nothing to do with the principal. It is the result of more savvy parents who want to apply under phase 2B. In fact the appln was already hitting close to 60 by Jan, which explains why they closed the appln instead of the usual cut off in May/Jun. Also, the School took an extra step to "survey" among existing students (ie my son) to estimate the number of appl for phase 1A so that they can gauge the chance of PV for phase 2B. (There was an exceptional high phase 1A for my year of enrollment that caught everyone by surprise).
Limiting PVs at 30 may be ideal but one probably need to register much earlier to be eligible.