i got my "Saw Bird Blades" yesterday and had a 1" challenge for them ready to cut.2 layers 1/4" luan, 1 layer 1/4" bead board, a 1 layer 1/4 mystery plywood. (would love to know what it is. Please!)the pattern i used was over 22" long and 12" high with lots of tight turns.it took only 1 #3 spiral rev blade to cut and had only a little stretch that required about an 1/8 degree turn of the tension on my hawk.with this being my first project with saw bird blades i am very pleased with it's performance and recommend them for all that use spiral blades. (i don't use flat blades)
for me in the U.S. the Canadian exchange rate puts the price of a Gross is $26.79
we'll see if using them turns my like of them into love.
Saw Bird Scroll Saw Blades
http://www.sawbird.com/scroll_saw_blades.htm#saw_blade_prices
( i am not being paid to review this)