10. The sentences imposed in the Magistrates Court are not to be set aside simply because I, on hearing the appeal, conclude that I might have imposed a different sentence. I may uphold the appeal and substitute a sentence for the original sentence if I am satisfied that the exercise of the sentencing discretion of the Magistrates Court was affected by a specific error, but only if I, in re-exercising the sentencing discretion, consider that a different sentence is appropriate and that I am not merely tinkering. Specific errors may be errors of law, errors of fact, taking account of irrelevant or extraneous considerations or failing to take account of relevant or material considerations. If I find specific error but the original sentence nevertheless appears to be appropriate, I should dismiss the appeal rather than allow the appeal and re-impose the same sentence. Even if I cannot identify a specific error, I may uphold the appeal and substitute another sentence for the original sentence if I find the sentence to be manifestly excessive, unreasonable, plainly unjust or plainly wrong.