 The follow-on 2G-2 proposal was to have had a second rocket motor in order to be able to place the second stage in orbit, though with little or no payload.
<clarity>  The follow-on 2G-2 proposal was to have had a second rocket motor in order to be able to place the second stage in orbit, though with little or no payload.
 The follow-on 2G-2 proposal was to have had a second rocket motor to place the second stage in orbit, though with little or no payload.