Kudos on the new acquisition, but there's always more bike stuff to spend money on. Try harder. HTFU.

Maybe start with a Silca Ti Torque Kit? Will that fit in your tool storage cubby?

Or maybe an action/dash cam for recording rides?

A carbon-railed, 3D printed saddle?

An OSPW?

Wait - do you have Di2?! If not, that one should have been obvious.

See - plenty of stuff to buy. You're welcome.