This is the most active forum page anyway, so it's a great place to post your questions while you still can post here.
You will get a great amount of information from the RBA sub forum by just reading however.
I don't use an Octopus so I'm not exactly the ecf expert on them. However I have seen some very innovative builds with them. So look around the forum, and you will find some interesting things to try. Also RDA's are quite popular in the Phills, so don't be afraid to use the local resources that you have there.