Great hack but i have 3 suggestions
1- each group have diffrent number of notes can set from group permission
2- the note is shown in the usercp note another page
3- when you set the permissions for a number (ex. 2) the 3rd note apper and when you try to write in it is write after that if the user update the note every thing gone !! and this is not good for important notes

, hope you can fine some way that is you set the namber no new note place apper