Poor brakes with no feeling

[Bob Culver]

Most other cars have a single cyl with two pistons so, assuming the pivot is symmetrically placed, direction is the same. I gather Seven conversions commonly use the single piston type assembly with the body of the cylinder floating on the backplate, so it behaves like two pistons..  Also with these direction should not much matter. I have no experience of Sevens but with  the type on other cars can get situations of wear or mismatched shoes where the cyl body reaches limit of travel, then more or less  becomes single shoe and direction matters. The conditon is not always very obvious.