Though I highly covet a round small bag saddle from the British company Carradice, as well as the x-small saddlesack from Rivendell, I will settle with this quick fix – for now.
I went to the hardware store and bought the two rectangle keychain small pieces for about $2.50 for both, and here is what happened.
This is what all that fits in my skull little bag. +a rear blinkie light.
Detach it and go.
The strap detaches, so it works.
keychain attaches to bag and to the Brooks saddle hooks.
This went inside. (clockwise from top right: first aid kit *yes includes neosporin*, camera, keys,
Red notebook, pen, wallet, phone, sunblock, vitamins) Later added rolled up arm warmers and 3 granola bars.
Coffee went into insulated KleanKanteen + water bottle, both on the racks.