here:
this is where you can find all the answers to your questions.
why there were 2 boards, and now only one, what else is needed. the thread provides the link to Wilba's wiki page also.
as i said, we won't be able to read it for you.
if you like to build it yourself, then you'll need to read the matrial yourself, like everyone else.
so diy and btw, if you like to see all info about the topic collected in one place, i'm sure nobody will find it rude if you create that thread and put everything there
:thumbsup: