At the risk of being disloyal (as a current Vig A2), I think the Vig should never be a SEP. It doesn't have flaps, no double ignition system, no real fuel management to do and doesn't even have a DI! When you look at the kind of flying that we do (i.e. all local area, no real navs/landaways, little RT, no powered approaches etc..) I would be surprised if the CAA ever let more hours count towards a CPL. I fly SEP as well, and I would bet anybody would struggle to get to CPL standard in a SEP without a good grounding and some decent SEP hours post PPL issue.