Thursday, 25 February 2021, 5:57 pm Back for more at the opening rounds of the 2021 HSD Building Developments Ltd Mainland (Kart) Series at Invercargill and Dunedin this weekend are three drivers who competed at the pre-COVID-19 Lockdown meeting at Invercargill in 2019; Zach Tucker (now competing in the Vortex Mini ROK class), Jacob Douglas (still in Rotax Junior) and James Watson (ClubSport LO206 Light). Photo credit: Fast Company/KartSport NZ archive It’s a case of ‘what a difference a year makes’ as far as KartSport’s Mainland Series is concerned with over 60 karters signed up to contest the three weekend/six-round HSD Building Contractors