Hi everyone,
well we dipped into the savings account and got ourselves an Exedy Heavy duty clutch ($450) and got the whole synchro kit fully replaced on the gearbox.
The Synchro kit from Cobra Transmissions only cost $150 inc postage and then a gearbox specialist here on the Sunshine Coast did the work and we got the MT-90 oil in.
Runs real good now, very smooth! Pretty sure that's it now