hey there
congrats on your twins
my twins were born nearly 10 weeks early and weighed 1402g and 1800g. They fed 3 hourly till they were 6 months old day and nite!!! They were on full EBM for all this time and then introduced solids at around 6 months as well. They then started stretching out to 4 hourly.
HTH and hang in there!!
odette