A Spring update - using a banana bag doesn't interfere using interruptor levers. It sits on top of them. I might make a couple of foam spacers, but on some lightly technical terrain had no issues using the interruptor levers so i may not make the spacers at all.
the latest reiteration of the UL rig, looking remarkably like the stock UL rackless rig seen in picture after picture.
I did make my own feed bag out of a climbers chalkbag, the banana bag is an ancient side pocket of a rucksack, and on the bike i've hose clamped a third bottle cage under the down tube.
Today on a ride testing the rig, half loaded. 5 ounce bivy on order, spring trip next week.