I currently have Olympus FL20 & FL36 flash units which I use with my E500 and E520. I've been hunting for a more powerful unit for outdoors and there are several Metz units on Ebay at the moment. In particular the old CT4 and later CL4 models. I can't justify the cost of a CL4 Digital at present especially as the Olympus/Metz adaptor cost around 40. So assuming I were to buy a CT/CL4 and the adaptor, am I going to get full TTL functionallity and performance from either flash unit.