Wise words indeed! As frustrating as it is I realise it's all part of the learning process. I intend to make a few heads anyway so it's only a matter of time til I strike it lucky.
It does give me a lot of respect for all mini sculptors out there: how do they achieve detail and correct proportions while maintaining such a small size? In this instance I couldn't have worked any smaller! It will come with time and experience and I am pretty happy with the progress I'm making.
I will have a go with the other jaw I've prepared but also, rather than working vertically (from the lower jaw upwards), I will make an attempt at sculpting in relief: the whole face on the flat of the cork. I think that will offer me the stability I'll need to work at the required size.
The head should end up to the size of this digital mock-up:
In the meantime there'll be no sleep lost as I have much work to do regarding the power claw, shoulder pads, sword and other detailing on the torso. There's no hurry as far as the head is concerned
As for this rejected head I'm sure it'll have it's uses in the future!