Got a bottlecage case fitted onto a new MTB build but I'd rather not have it quite so exposed in case the bike gets decked left and the plastic case snaps.
I think it’s pushed down below the star nut. You wouldn’t be able to use a normal star nut obviously, instead a removable carbon steerer type bung or something like the Hope head doctor.
Looking at this steerer mount, I don't see how you'd tension the headset:
https://www.pro-bikegear.com/uk/accessories/di2-accessories/di2-battery-holder
Got a bottlecage case fitted onto a new MTB build but I'd rather not have it quite so exposed in case the bike gets decked left and the plastic case snaps.