'eagle claw' tail* should get the toe in adjustment OK , if you are using V Brake paired washers
convex and concave faces , 4 pieces, on either side of the brake caliper mount
so squeezing the brake against the rim, 1st, then snugging the fixing nut on the brake pad stud
holds the pad in that angle , not forcing it square to the brake , which is coming down tail first.. leading end.
'toe in' is actually coming down pad trailing edge first, as rim at the top is rotating forward.
* its there to clear off the crud from the rim ahead of the actual braking surface.