I was anxious that some naysayer was going to post an objection dealing
with required "counterweights" on the contraption I suggested [but was not the first to come up with.]

That problem can be solved by skillful use of falange tracks [better still: maglev tracks] on the four 150 mile long spokes to rapidly shift around the multi-ton [20-50 ton?] counterweights; to balance and correct the orbital path
of the device after each drop off, or after each return-to-earth ejection.
And the device would be totally "reusable".

A similar device would work great in LEO. A delta-vee of 1600 meters/second [added to LEO orbital speed]
is nothing to be sneezed at...And 3,200 meters per second delta-vee is certainly not out of the question.

cheers.

Jake