The last round of the tri-series was held at Yandina Speedway on Saturday night.  For the first heat Nathan started from position 2 beside Steve Conway.  Conway got away to a better start and beat Macdonald into the corner.  Macdonald tried to catch Conway but it wasn't until about the sixth lap that Macdonald found a way past.  Macdonald opened up a good lead and took the first heat win, with Steve Conway 2nd and Paul Zoubakin 3rd.  1st Nathan Macdonald     2nd Steve Conway    3rd Paul Zoubakin. 

In heat 2 Macdonald started from position 6.  After the green flag dropped, Macdonald found a way around the outside of Terry Medcalf and Shane Hollyman to find himself up into 3rd spot.  Shane Hollyman was then challenging Macdonald, by getting up the inside on numerous occasions.  But Macdonald pushed on and then passed Paul Zoubakin up into 2nd.  Steve Conway was having another good run, leading the race.  Macdonald managed to reel Conway in, and take 1st spot on the last lap.  1st Nathan Macdonald     2nd Steve Conway    3rd Paul Zoubakin. 

In the 3rd and final race, Nathan found himself on the front row beside fellow Toowoomba racer Peter Rodgers.  Nathan stole the lead into the first corner, while Rodgers slotted back into 2nd.  Macdonald opened up a half lap lead over Rodgers until about 6 laps into the race, Macdonald's engine gave way, forcing the car on the infield with a blown motor.  Peter Rodgers kept up the pace, to fight off Steve Conway who was challenging for 1st.  Rodgers taking out the final heat with Steve Conway 2nd and Chris Duffel 3rd.  1st Peter Rodgers     2nd Steve Conway    3rd Chris Duffel.  After the night's racing, this left the tri-series point score with - 1st Nathan Macdonald, 2nd Paul Zoubakin, and 3rd Terry Medcalf. 

Macdonald copping the sweet win of the tri-series at a cost, a blown engine.  Nathan and his pit crew will be prepared for a busy week to try and piece back together the engine for the Australian Title next weekend.