It's always difficult to perfectly adjust the rear rim brakes on Solex when they are installed.
No braking, routing the cable and housing, pad clearance... it's often a hassle.
This new video from L'Atelier explains how to succeed on the first try, starting with a good foundation:
true wheels,
new brake pads
new cable and housing, of the correct size and with a "proper" routing
So if this operation has always put you off, now is the time to regain confidence :)
And if you're still allergic, L'Atelier can do it for you ;)
Happy viewing!