sub WriteSpinData {
    
    my ($OUT_FH, $ref_data) = @_;

    my ($last_major_frame, @cur_spin );
    my $row_length = 15*160+1;

    for my $filename (sort keys %{ $ref_data }) {    
        my ($basename) = basename $filename;

        for my $major ( sort { $a <=> $b } keys %{ $ref_data->{$filename} }) { ### Processing data for $basename [===|    ] % done
            for my $minor (keys %{ $ref_data->{$filename}{$major} }) {
                next if $minor !~ /\d+/;

                my @data =  @{ $ref_data->{$filename}{$major}{$minor} };

                if ( !@curspin ) {
                    # This looks wonky ... you should double check this
                    # At the very least, the 165 should be in a constant and
                    # a comment should be here explaining why only $minors that are
                    # divisible by 10 are allowed to start a @curspin
                    if (($data[3] == 165) and 
                        (($minor % 10) == 0) ) {
                        my $index = "$filename,$major,$minor"; 
                        @cur_spin = ($index, @data[3..17]);
                    }
                    next;
                }

                push @cur_spin, @data[3..17];

                if ( @cur_spin == $row_length ) {
                    print $OUT_FH join(",", @cur_spin), "\n";
                    @cur_spin = ();
                }
            }
            $last_major_frame = $major;
        }
        print "$basename: " . int($last_major_frame) . " major frames.\n";
    }

    return;
}