Have a look at the British Midland rotor drive cover incident on the AAIB's web site. It is a very good example of how lots of small human factor incidents can combine to cause a major incident. Lots of good points to talk about.
I'm not sure but I read the new reg's as any section L licenses issued for aircraft below 5700 KG will not count towards a JAR66. But I may be wrong. The surveyor will be the one to ask. Or have a look at the SRG website, there are a few Q&A pages about JAR66 conversion. They may however be convertable to the light aircraft licenses (B3???) if they ever manage to agree on a structure for that one. Don't hold your breath though.
Keep your study simple. You have done all the in depth stuff on the written. As KP said it tends to relate more to how you intend to use your license if you get it. Attitude, SAFE, and a good general knowledge of your subject.
All the best and let us know how you got on.