In all honesty, I'm not experienced enough to do it myself. I can do a lot of the simpler car things now (fitting ECU's, injectors, changing exhaust manifolds, changing cams etc...), but nothing gearbox/clutch/flywheel related!
To my surprise, when driving the car today, I used reverse on 4 separate occasions and had no issues with it.
But its not something I am going to overlook, will be going to workshop soon.
Really appreciate the advice mate.