Hey so I normally ride drop bars. However my bike broke recently and I have been borrowing a friends for work (I cycle 10 hrs/day as a corrier). This bike has cruiser bars that mean I sit completely straight which helps when carrying this bag.

Now what I was thinking is putting a really high stem, iv seen a 40mm dutch quill stem. Would this work? Has anyone tried it? I dont wanna swap my bars to flats as that is a huge amount of work but was thinking maybe if I can have a completely flat back when im on the tops, I would still have the hoods and drops for more aero positions.