Titanium Tandem - Advice

[tandemrider]

I've been working with Ti-Bikes on a tandem bike. Would like opinions on the frame and if I'm overlooking anything.
https://imgur.com/rCFCCNq

The bike will use SRAM AXS; Force Wide front derailleur w/frame clamp, 2x chainrings 50t/34t, Wide cranks, 10-36t cassette, Gates CDX 39t timing rings w/belt, 68mm wide T47 external bearing bottom bracket, eccentric front bottom bracket

[tandemrider]

Image

[Sakizashi]

I don't know that much about tandem design, but this builder does Z-style couplers, which might be a nice upgrade vs. S&S.

[tandemrider]

oh, I didn't realize they offered that style of couplers. I'll have to ask them.