Handy item from AliExpres

A little adapter to allow you to use a hanger alignment tool to check your brake levers are at an even height

Manna from heaven for us OCD types and only a tenner

At least it was a tenner, it has near doubled in price since I bought it earlier

I use a level app on my phone

Also this is a knock off of something a proper tool company invented.

I just drilled a hole in a broken mech hanger, and bolt that on instead of a stem cap. Even a tenner seemed excessive.