I am a fan of one finger braking, and I did slam the lever all the way to the stem. Pretty janky, but worked well for me for a few thousand miles before I decided to go brakeless.
I love the Paul e-lever, it's pricey but the machining is great and it certainly adds some aesthetic internet points. I've also had good experiences with Avid FR-5 levers.
Sweet build and best of luck.