doesn't parse successfully, because there are two selbri ({voksa} and {macri'a}). Also, ri'a and du'i don't add together; it becomes something more like {ro'a zo'e du'i lo nu volfi ku}
Neither {to'o} nor {noi} are sumti. {to'o} is a tense tag, so when it precedes the selbri it means that the entire sentence (bridi) is in some sense leaving somewhere; when it precedes a sumti, it means that the action of the bridi is physically moving away from that sumti.
{noi} must follow a sumti, and whatever is in the {noi ... ku'o} must be a bridi, and that bridi describes the sumti.
{cu} instead of {fe} would have been grammatically wrong; {cu} must come immediately before the selbri.
{lo zu balvi} is a weird construction to me; it means "the thing which far in the past or in the future was/will be a future". Maybe {lo darbalvi} is better?