According to the test in the German Surf magazine, the Severne RedLine RDM 400 cm has 63.5% bottom flex and 73.3% top flex, i.e. IMCS 9.8. The IMCS stiffness was measured to 18.0.
I am also searching for mast bend characteristics, but for the North Platinum 490 cm and 520 cm masts. Anyone?