I see some people are quicker to skim posts and spout off things like UTFSE than others, or some of you would have realized he said E/I2/H reduction, meaning hypo. Now whether or not that is sufficient time for a hypo, SWIM has no clue.
However, no matter what reduction, 13 something odd liters of water per 10g of a helluva lot. SWIM would have used like 500mL or something to finish that rxn up. As far as adding base goes, SWIM always adds straight base (not NaOH solution) slowly but surely to the finished rxn. SWIM has found meth to be pretty damn durable when it comes to basing, and really any gaks that carry through would be your only concern with the basing. However, seeing as your gonna steam distill (as does SWIM), it really doesn't matter what gak you activate by accidentally adding too much NaOH to fast or something. In SWIMS experience, it all comes over clean anyway.