Are the "bar-ends" 22.2/23.8 mm OD by any chance? Look a bit smaller? Would be kind of interesting to be able to fit levers on them, although not sure how useful it'd really be.
Will your fork be 1 1/8" straight? I suspect a 1" disc fork might be surprisingly popular if the price is right
Oh that would be a nice option for the cargo bike. The VO bars have too much of an angle IMHO (hence why Alee created the bars with Koga actually), but his negates all the stem reach too. A bit of forward extension after the clamp is good in that respect IMHO.
Looks quite similar to what I've done with some On One OGs and a set of barends but neater and wider. Yes please!