We were tandem riders forever. As we aged, and e-bikes came along, Mrs. K decided to try one of those, and we have more fun on separate bikes, hers with e-power, and mine without.
Right before that happened, we were
this close to ordering a custom Co-Motion like
@Gibby. Sweet bike!
EDIT: Our tandem "arc" was first a Gary Fisher something or other (Gemini?) we bought on a whim while my dad was doing the paper work for a rental bike. Later we moved on to a custom Santana Sovereign.
For anybody that knows PNW mtb riding, our tandem claim to fame (more like youthful stupidity) was that we once rode the Lewis River Trail. Giving the late, great, David Foster Wallace his due, that was something that fell
solidly into the category of "A Supposedly Fun Thing I'll Never Do Again".