No experience with the veloci. Had some Raask's on a r65. Fit and worked fine, a little crude, the mounting plate was just a cast hunk of steel. No instructions if I remember right. If I would have kept the bike I would have redone the mounting plate in aluminum.
"Between two explanations, choose the clearest; between two forms,
the most elementary; between two expressions, the shortest."
Between two motorcycles the simplest (DW)
Eugeni d' Ors (1881-1954); Spanish writer.