Westland cup 2006 was at 29th / 30th July it is typically 3 weeks before the rem-race.
Often the REM-race is surrounded on either side by the Dutch F18 championships and the individual builder championships (nacra, hobie etc). So not much change of combining more events into one go unless you are willing to spend 3 weeks or more here.
And Phill, you forgot to mention the blue moon ! You remember that rather rare natural aquatic light show for which we woke you while you warned us that :"it'd better be good !"
Wouter