OP, looks like a nice and clean ride. There's quite a bit of learning curve in riding tandem and total different spectrum of cycling. Not for everyone but well worth exploring or attempt.

Lots of comments above about the crank extraction.

I do have a few bikes with various models and years TA Specialite and Stronglight cranks. Our tandem has TA cranks as well. I lose track of what fits what but use an older, I believe no longer produced Park crank extractor. Sort of funny because twice have had comments from bike shop techs who tell me its not readily possible to do, whatever. Maybe they're blurry eyed on how cool the cranks are. Anyhow, I've never had a single problem using it. Has a reversible threaded head - different threads that's used in all my vintage and that fits both TA and Stronglight. Let me know if you need the Park tool number and I highly suggest hunting fleabay. This way you'll have both French version thread application.

Some additional notes from the Sheldon Brown site:
Older TA and Stronglight cranks each had their own unique thread for for the crank extractor, and you will need to get the correct puller for the crank you are working on. TA used a 23 mm extractor, Stronglight used 23.35 mm until 1982, when it converted to the standard 22mm diameter. You must use the correct crank extractor. Be especially careful not to use a TA extractor on a Stronglight crank. It will thread in, but it may strip the threads in the crank.