Chuck, you're a brave soul using the terms "Heavy lift" and "53D" in the same sentence. Sure the Delta squadrons are prefaced with HMH but they are medium lift. As old and tired as those airframes are they struggle to lift 'much' more than a CH-46E. Yes there is a high demand for heavy lift so why get ride of so called "heavy lift Deltas" and replace with Medium lift Ospreys....? When the USMC talks about lack of heavy lift they mean the CH-53E sustainment and bridging the gap to the Kilo (which is a huge bone of contention).
I find it very interesting that CH-53D's are being pulled from the "boneyard".