I am still thinking about building up a M4O 36 when the frames arrive in the spring and I will be putting a brake on that. Mainly so I can be try and copy @rogeratunicycledotcom and @Maxence
I mean I am likely to hopelessly fail and be back to 125mm (because they are good and I am not) but at least I will have a brake.
So you will still have one more brake than me. 