Align Blades with balsa core

[jwatts007]

Broke a blade today think it was a 600 pro 3d or something like that, had a wooden core, do all align blades have a balsa wood cores, broken plenty of them, cannot remember seeing the wood before, are they the cheap range align do, I paid 50 quid for them.

[moonmanflyer]

Only the 600D pros have wood cores, makes them stiffer, like V-blades