I have been searching the internet for a nice large/small tandem. I ran across this medium/small tandem on the Austin Craigs list. Here is the response from the seller if anyone is interested:
"The bike is a medium. I’m 5’8” and my husband is 5’10” - it fits us really well.
It’s a sweet ride, we just don’t have the time for it. We have over 5k into this bike.
I’ve brought the price down to $3000. Call me if you interested. Lori (713)203.5827
Here is some basic info on the bike:
Here is the original Craigslist ad:
Hope this helps someone.