I was thinking of much the same but a pair of super cheap 7 1/4" blades on the arbor would give a little larger target. A more powerful 12V saw would be even better as most mills already have 12V available. Looking at how WM has their debarker set up, I've seen some that appear to shoot the dust (& dirt & rocks) into the band while others it appears the blade spins to spray the swarf away from the band which makes far more sense.