Excel export button: how to setup differing / multiple "exportOptions" for individual columns?

ASWS

(.net)
button excelHtml5 export:

Question:
I need to modify export data of columns let's say A B C and columns D E F differently, and it can't be done in one go.

Therefore in export options I need to parse and substitute data column by column!

I would need to define something like this:

buttons: [{
extend: 'excelHtml5', 
messageTop: 'your exported excel data looks like...',
exportOptions: {
                            {
                            columns: [1, 2],
                            stripHtml: true,
                                format: {
                                    body: function (data) {
                                        data = data.replace(/[K]/g, 'O');
                                        return data;
                                    }}
                                },
                           {
                            columns: [3, 4],
                            stripHtml: true,
                                format: {
                                    body: function (data) {
                                        data = data.replace(/[O]/g, 'K');
                                        return data;
                                    }}
                                }
                        },

Above obviously doesn't work, just for explanation...
Is sequentially modifying data somehow possible at all here?
Thanks in advance !

ASWS

ok, I answer my own questions now.
should have tested this earlier.

so here's how to modify & export data to excel, column by column, before export:

buttons: [{
extend: 'excelHtml5',
messageTop: 'your exported excel data looks better now...',
 exportOptions: {
      format: {
         body: function (data, row, column, node) {
         if (column === 6 || column === 7) 
         {
         data = data.replace(/[€.]/g, '');
         data = data.replace(/[,]/g, '.');
         return $(data).find('.title').remove().end().text();
         }
         else
         {
         data = data.replace(/[.]/g, '/');
         return $(data).find('.title').remove().end().text();
         }
         }
         }
...