re wood, I do not know what it is like down your neck of the woods but up here in Canada I found out that one of the local construction supply stores sells planks of BALSA !!! I bought a 72 " piece of 2X6 for $40 and have cut about $300 worth of stuff out of it, the neat thing was that you can custom cut spars and sheeting to what ever size you need at the time, I am lucky enough to have the wood working tools to cut it, I also found that the plank varied from hard to soft and you could pick and choose what you needed MIke