Only build one leg, then mirror it. You can spend twice as long on that leg knowing your other leg will be of the same standard.
Have you got reference images? Refef to them constantly.
The presentation of the model for us to critique could be improved - shameless plug:
rsart - home of Rick Stirling, games artist, designer, egotist and raconteur » Blog Archive » How to present your model in the best way possible for feedback