I've read elsewhere \MPrawvar allows a preset to be applied outside \start...\stopuseMPgraphic.

\startuseMPgraphic{hi}

draw fullcircle scaled \MPrawvar{hi}{u};

\stopuseMPgraphic

\setupMPvariables[hi][u=1cm]

\startMPcode

\includeMPgraphic{hi}

\stopMPcode

However, \includeMPgraphic{...} only accepts one argument. I've come up with a somewhat ugly solution to pass a different value:

\begingroup %\start

\setupMPvariables[hi][u=2cm]

\startMPcode

\includeMPgraphic{hi}

\stopMPcode

\endgroup %\stop

%Outside \MPrawvar{hi}{u} will be 1cm

What should I do to keep redefinitions local or pass settings only for certain instances of \IncludeMPgraphic{...}? Is there a better solution? Thank you in advance.

Best regards and best wishes for this New Year!

Jairo