OOPers?!!
Glad some more tandemistas are giving OOP a try!
Been tandeming since 1975 and our first tandem was delivered with pedals in-phase (IP).
That tandem taught us what we liked/disliked about that first twicer.
Less than 2 years later we designed our first custom tandem and we experimented with out-of-phase (OOP).
Tried 180 degrees OOP . . . not much difference; then 90 degrees OOP with captain leading . . . EUREKA!
We discovered easier starts and quicker acceleration from a dead stop; definitely easier climbing for us. Less tandem sway/flex when stomping on the pedals; less wear on some components.
Been told "you'll hit a pedal when cornering" . . . not so. When hanging a corner captain has pedal up whichever way he is turning, thus putting stoker pedals out of harms way.
"You'll bash a pedal hitting a speed bump" . . . maybe. Have done that exactly once; we were crossing the border from the US into Mexico 32 years ago; we did strike a pedal on an extra-ordinary high speed bump. Nowadays the speed 'humps' are nowhere near as high.
We suggest you give OOP a try . . . you *may* like it.
We've now pedaled over 225,000 miles OOP . . . guess we like it!

Pedal on TWOgether!
Rudy and Kay/zonatandem