A steel core is enough, metal windings are not neccesary (but help a bit). So Eurosonics/Presto Nylonwound work because they have a steel core.
But Velvets won't work, not even the Compas 180 chromesteel windings (because they are very thin). Any Innovation string, Evahs/Obligato and Dominant don't work too.
But Velvets won't work, not even the Compas 180 chromesteel windings (because they are very thin). Any Innovation string, Evahs/Obligato and Dominant don't work too.