If the IMX is the same as older IMX rods in the carbon used, it is 40+ year old material they are using. The Lamiglas IM700 was the same stuff and when was the last time one of those was made? I have no idea what is in the E6X they have kept everything close to the chest a longtime. The new carbons are nothing like the old, it's not just the carbon modulus anymore, this is where NFC is working, the new carbons are a different fiber size. the old ones had a fiber size of 160, Gary Loomis had the his supplier try to improve this, GLX was a fiber size of 100, making them smaller, this would allow more fibers packed more densely with less heavy prepeg between them. The modulus and weight can change if you don't change anything else if you decrease the prepeg ratio to the fiber amount, prepeg has a very low modulus. Anyway, Gary is playing with some new stuff with a fiber of 8, imagine the difference this can make. Just use a quarter to draw a triangle of circles, do the same with a nickel and a dime to illustrate the difference in gaps that had to be filled by the heavy prepeg. IMX after it was brought back had a glass scrim to improve hoop strength, old IMX were carbon paper scrim, the new fibers and resins make this unnecessary increasing the modulus again, again ratio to scrim and the modulus of the scrim matter in the final product. We were always told the modulus of the fiber, not the modulus of the final product our rods were made into. Gary built a ST962-2 (HM) that weighed only 4.7 oz. officially weighted near 15 years ago, imagine what the new ones are now if we tried as hard.