D-Noizator: a magic active noise canceller to retrofit & upgrade any 317-based V.Reg.

If the vias have to carry any sizeable currents, I suggest using Z-wires on them. A Z-wire is a short piece of tinned single-strand wire inserted through the via and bent over on both sides of the board, onto the traces the via connects together. The wire is soldered to both traces. The wire ends up having a sort of Z-shape when used this way, hence the name.