Resumed pumping 2K IMC annulus ion pump volume with pump carts during the maintenance period today.  Energized ion pump controller after an hour or so of pump cart-only pumping and the combination got the ion pump current down to 5ma -> Left ion pump controller on but had to shut down the assisting pump carts at the end of the maintenance period.  As of this writing, it looks like the ion pump current is just now coming back on scale so, perhaps, additional assisted pumping won't be required.