Tim, thanks for the quick and helpful reply. I browsed on the SIG product lineup but couldn't find the exact material. I guess I will just give them a call. Btw, did it really work for your project? I was thinking to do like the others suggested i.e., to glue tiny wood strips on the balsa and cover it but was a little worried that the covering may not stick properly specially if I want to make the spacing really close to each other.