The blade condition is a factor -- as is the gumminess of the wood.
My experience has swung all over.
BTW, the Fein is a dream machine for flooring, which is outside our usual scope of activity.
The blades -- labeled as metal cutting + wood are NOT able to tolerate hardened metals -- even drywall screws. Been there, done that.
It's essential to keep the blades clean of any resin. They are much more vulnerable to tacky wood than any other.
I'm going to experiment with a Dremel to see if it can re-sharpen the 'E' blades.
The attachment core is hardened brittle steel. So it's wise policy to not stress the cutting too much. You'll tear out the pivot core... sort of like losing teeth on a starter gear.
