Thanks everyone very much! I will look for some gyp board as what I have here is to small 18". I will be forwarned on the sanding. Cannot be as bad as the pine loft bed I just made my daughter

Carrell, how do you like your board for the larger .60 wings? I am building a 72" wing kit. I like that block idea. I found another but it is more $$ [link=http://www.guillow.com/guillowdetail.asp?UID=3114659&Num=2&SeriesId=31&Fa milyID=6#]workboard[/link]