My mother in 500g ketone runs, (ala MM), I end up using 10L of 30% NaOH, which is shitload less than specified, but before toluene extraction I also add ~10L of water, to increase the polarity, often it depends on how long you have let the rxn run, if overnight then this is heaps but if you stop it after three or four hours (the rxn runs longer at this scale I have found), it often needs more NAOH. Every now and then I observe weird things in the mix, like brown colours or fluffy white suspensions, but these never seem to affect the yeilds.
wacka wacka wacka