Question regarding E230 "modes"

Sorry if this was asked before and posting this new thread.
This was posted in the original E230 discussion thread but no one is replying.

I see people talking about E230 "boost mode" and "upper mode" but I really have no idea which is which, can someone tell me?

Which mode is better for which type of custom and why?
This doesn't need a thread
Post this here:
http://worldbeyblade.org/Thread-Ask-a-qu...2?page=983
Your question will be answered there. Read the rules Smile
Make sure to read our Thief Phoenic E230GCF draft in the Beywiki Project forum; it completely answers your questions.