Support BladeForums! Paid memberships don't see ads! Carbon fiber's rigidity or stiffness is measured by its Young Modulus (measures how much a material deflects under stress). It is over 4 times stiffer than glass reinforced plastic (G10), and 2.5 times greater than aluminium... no casual issues will be had with it flexing or bending the end resting on the blade stop. I will however need to investigate the Micarta version when I get to machining those. Micarta doesn't have the stiffness nor strength... so as I stated previously I may have to go with a thicker spine and machine a blade clearancing kerf or slot as I did in the Small Sebenza back spacer version.