The Blitzboks are edging closer to being a finished product as the Rio de Janeiro Olympic Games in August come into sharper focus.South Africa finished runners-up in the sixth round of the HSBC World Sevens Series in Vancouver, Canada, at the weekend, leaving them a point behind overall leaders Fiji with four tournaments left.The Blitzboks toppled Fiji 31-19 in a pulsating semifinal in the series' newest stop, despite conceding yet another yellow card. They fell short against old foes New Zealand in the final though, losing 19-14.Fiji have 106 standings points, South Africa 105 and New Zealand 104 in one of the closest seasons yet.Critical assessment of South Africa's season so far reveals remarkable consistency with five semifinal and three final appearances. But the Blitzboks have only won one of those finals, in Cape Town.South Africa's defence has been brutal all season and coach Neil Powell is close to finding his perfect 12 with the emergence of Bryan Habana and Tim Agaba as viable sevens players.On attack only Fiji (1 059 points, 165 tries) have better numbers than the Blitzboks, who have scored 926 points and 146 tries. Flying wing Seabelo Senatla has scored 43 of those tries - 13 more than closest rival, Fijian Savenaca Rawaca.The Blitzboks were superb in Vancouver, only conceding one try in three pool matches and a quarterfinal against Wales. They continued that form in the last four. New Zealand, realising that the Blitzboks had more pace, slowed the match and starved South Africa of possession.The Olympics will be cutthroat and one poor game, or one tactical error from a coach or player could be the difference between a gold medal and no silverware at all.The series moves on to the Far East for the next two rounds in Hong Kong and Singapore in April...