I joined as a CEP in 1998 (started training in 96) with 100hrs PPL, UAS and RAF Flying Scholarship. The company's unofficial line was that this was about the realistic maximum, however it probably depends on the individual. Personally, I would say that a few hours under the belt probably looks pretty good, maybe even going solo. However, don't over do it. Work on the principle that the best flying is when someone else is paying!!