If you haven't crossposted in the Parenting Multiples forum, I highly suggest you do.
I am afraid I can't help, but I do agree that it seems you pretty much have
to demand-nurse twins.
I am a long-time tandem nurser, and I know it is physically possible, although sometimes awkward, to nurse two at once. Admittedly, there is an age difference, but it's still a matter of wrangling two squirmy bodies.
Sabra: Mama to Bobbie (3/02), Linda (1/04), Esther (10/05), Marie (11/10), Douglas (11/12), & Psalm (09/14; in Heaven)