Update on simple upgrade: The aluminum star drag from the CU200E's will work as a replacement along with the matching star drag nut and star drag spring.
Photo's: CU200E5 on left, CU50E on right
Star drag nuts are same size, only different thickness.
top view clearly showing different star drag springs sizes.
angled top view clearly showing different grooves on star drag nuts for different star drag springs.
angled top view showing springs seated in nuts.
Will the aluminum star drag fit over the smaller spring? Yes, but the spring will not seat properly on the groove inside. Functional but best not to force it.
Will the graphite star drag fit over the larger spring? Yes and no complication. There's no inside groove on the graphite star drag to seat the spring.