Thanks for the replies. Robert, do you recall your Lantus dose before taking on Bernstein diet?
For some reason, small doses of Lantus don't work for me because they metabolize more variably than larger doses (the peak varies 20 to 80 points), so I don't split it. My peaks on split doses of Levemir are more consistent but still vary enough that I can't offset it reliably (30 to 70 points). Pumping would eliminate the problem altogether but is a big commitment just to experiment with low carbing!