I used to own a MMF5 & never had a problem with it.
Like Rockinroni suggested above, ENSURE your 'table is level. Use a external bubble level i.e. do not rely on the level provided on the plinth.
If you have a stock Goldring 1012, then playing weight or VTF should be 1.75gms. Dial it in thru the marked counter-weight. If you have a Shure gauge, double check the VTF.
Place the anti-skate thread in the MIDDLE slot (of the provided 3 slots) on that metal protusion near the arm pivot.
You should be ready to go! Your 'table MUST be level before you can even begin to set VTF & anti-skating.
Oh, defeat the anti-skating (i.e. do not attach the anti-skating thread) while setting/dialing in the VTF.