oh-- simple, cheap, readily available magnesium supplements will do wonders for your feet and leg cramps-- but you must get everything under control, first.
A starting point is one unit of (fast) insulin per 10g of carbs. A unit of insulin will reduce blood sugar by 30 points- -as a starting guesstimate. .
Those are ‘guesstimate’ numbers. They do not work for everyone, and you must be very, very careful to avoid low blood sugar while you work out the details of that. SUPER careful.
Mike