that site of Anthony Bryant is genius ! Even better than my book !
He got lots of illustrations, in color, how to build your own armor
So everything is explained in detail !
Now I understand about the plates and the lacing. Still some part I don't understand. His illustration for the "boards" is a cutaway, not 3D, so I still don't undetrstand where the wooden board (or other material to replace the wood) go in there
(that for ione of the piece, shoulder plate I think - the cuirass is different)
Yeah that website is really great for people who are new to the subject.
The "boards", he is not talking about a wooden board or anything, when a number of scales are laced together horizontally they are referred to as a board, an example is shown on his website.
The scales that make up a board are made of leather and steel, alternating, as in side by side

(so you had the right idea).
The lacquer is there to protect the armor against moisture, as moisture will rot the rawhide and the iron/steel will corrode, the lacquer does not glue the scales together, that's what the lace is for.
A finished board of scales would be laced to another board of scales with suspencory lace so they overlap eachother, then another board will be laced to the second board, and another to that one, they will form the cuirass and tassets.
Just keep reading the website, it has all the information you need (but if you do have questions, just ask).
The thing with composite suits is this: someone (a collector or dealer) sees a nice cuirass for sale and buys it for a low price, then he buys some armored sleeves and leg armor that originally belonged to another armor set, then he buys some cheap kabuto and puts the whole set together.
An expert can see if the armor is a composite, but other people won't have a clue, composite armors are avoided by serious collectors and museums as they are historically worthless and antiques that are incomplete are just not very desireable to own, an old matching suit like my armor is what is valuable and worth collecting.
Sometimes, a composite suit ends up looking like a clowns suit with different colors of lacquer and mismatching lace or cloth backing, it's always good for a laugh though

Samurai never mismatched their armor, if something was damaged it either got repaired or properly replaced in matching style.
Do note that it's not uncommon for a helmet bowl to have originally belonged to another armor, that sort of thing happened when a samurai ordered a new armor but wanted to use the helmet bowl that originally belonged to his father or grandfather.
It was also common for an armorer to use old helmet bowls that were popular, those suits are considered matching suits.
I was watching this today:
http://www.youtube.com/watch?v=Dt9de6mjaNQ&feature=PlayList&p=8E3E0116246D5B34&playnext=1&playnext_from=PL&index=5 Awsome!