For technical questions on specifically JAA-type matters, I suggest you post them on Oxford's new free website, which is available to non-Oxford students (but don't expect an answer now until Monday!)
Post them in the 'Groundschool' section of @SK OXFORD FORUMS on
<a href="http://www.oxfordaviation.net/forum" target="_blank">@SK OXFORD FORUMS</a>
which is
<a href="http://www.oxfordaviation.net/forum" target="_blank">http://www.oxfordaviation.net/forum</a>
Paul