Since no one seemed to know that there was a "correct way" to adjust gear linkage, and were just using trial and error and good luck over good management, I have added it below for anyone whos interested. perhaps someone would like to add it as a how to sticky??

1) Select 4th gear.

2) Loosen the gearchange rod to selector shaft clamp bolt.

3) From under the car lock the gear lever in place by inserting a 3.5mm drillbit or allen key through the alignment hole on the bottom of the gearchange housing. (under car)

4) Ensure that the selector shaft is also in the corresponding 4th gear position by inserting a rod into the selector shaft hole, turning clockwise and pushing right in. (make sure you dont hit reverse)

5) Tighten the gearchange rod clamp bolt, remove the drift, rod and check the action of the gear change mechanism.